How to fix code p0744

When the required amount of lockup is not reached, this may cause the computer to store the code P0744. This may be what has caused the code P0734 to also be stored as a result of the ECM and TCM not reading the proper amount of engine speed relative to the speed detected by the transmission sensor. Code P0732 relates to the …

How to fix code p0744. Disconnect the transmission harness at the transmission connector, power source and TCM. Check for a short to ground inside the transmission internal wiring harness by locating the appropriate + and - pins for the torque converter clutch solenoid.

25 Sept 2019 ... Comments180 ; Torque converter clutch pressure solenoid valve testing & replacement , how to fix engine code p2763. SCS automotive · 11K views.

Fixing Nissan Code P0744. Once the cause of Nissan Code P0744 is identified, appropriate measures can be taken to resolve the issue. Possible solutions include: Repair or replace the TCC solenoid: If the solenoid is found to be faulty, it can be repaired or replaced. Repair or replace damaged wiring: Any damaged wiring connected …Meaning. The P0740 code means that something unusual has been detected by the powertrain control module (PCM) within the torque converter clutch circuit. The application of the torque converter clutch can be varied by the powertrain control module to optimize the performance of the vehicle. Multiple applications of the torque converter clutch ...Technical description and explained code P0744. Diagnostic Code P0744 is set when the PCM or TCM detects an intermittent signal in the electronic pressure control solenoid valve circuit. Computer controlled automatic transmissions use variable hydraulic pressures to shift gears and operate the torque converter clutch (TCC).About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Part 1 shows the dreaded compounder and troubleshooting the low clutch drum for Caravans, Town and Country, Volkswagen Routan, Pacifica, etc.More removal ste...Their spin-off company JATCO made the ones in Jaguar X-Types. The code P0744 A/T TCC Signal Torque Converter Clutch Signal. Most folks who experience this need a new transmission. If it were me I'd probably change the transmission fluid & filter, reset the computer and take it directly to be traded in. You could pay two or three thousand for a ...The P0734 code stands for “Gear 4 Incorrect Ratio.”. It’s logged when the PCM detects that the RPM of your input speed sensor doesn’t match the expected RPM in 4th gear. Some possible causes for the code include low transmission fluid, a defective 4th gear shift solenoid, and transmission failure. A lit check engine light, the inability ...The automobile fault code P0826 indicates a problem with the Up and Down Shift Switch. This can be identified by the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code could be a faulty switch, an open or shorted harness, or a poor electrical connection in the switch circuit.

Some of the common causes of a P0868 code are a faulty pressure sensor, a failed pressure pump, fluid leaks, and contaminated transmission fluid. Common warning signs of the P0868 code include an illuminated check engine light, transmission gear slippage, transmission damage, and the powertrain control module engaging the vehicle’s limp mode.The P0744 code can be triggered by several factors, including a faulty TCC solenoid, wiring issues, low transmission fluid levels, or a failing torque converter. Other possible causes include a defective transmission control module (TCM), a damaged or blocked oil flow to the TCC solenoid, or a malfunctioning pressure control solenoid.Meaning. The TCC creates a one-to-one connection between the engine and the transmission. This connection ensures that the car runs smoothly and gets good gas mileage. Without the TCC, the engine would have to work a lot harder to generate forward momentum. If the TCC slips, that can trigger code P0742. However, it usually happens a few times ...If you are experiencing a problem with 4th gear and a P0734 OBDII trouble code has been stored, then a mechanic should analyze the rest of the ECU data, to see if the problem is caused by electronic components like a solenoid. If the problem is related to the hydraulic system (which is often caused by dirty ATF), then the valve body, pump and ...Labor: 1.0. To diagnose the P1757 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

Labor: 1.0. The cost to diagnose the P0744 2011 Nissan Rogue code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Summary. The P0732 code stands for “Gear 2 Incorrect Ratio.”. It’s typically logged in automatic transmission vehicles to indicate issues shifting into or driving in 2nd gear. Some causes of the code are internal transmission failure, valve body issues, and low transmission fluid levels. An illuminated check engine light, delayed shifting ... What is the Cost to Diagnose the Code? Labor: 1.0. The cost to diagnose the P0744 2006 Infiniti G35 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. Code P0744 indicates a problem with the torque converter clutch circuit intermittent in your vehicle’s transmission. The torque converter clutch is responsible for creating a direct link between the transmission and the engine, which improves fuel …

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The dealer is saying they're getting a P0744 code, so the torque converter clutch pressure control solenoid is bad/stuck. They're telling me that the labor to replace this requires taking apart the entire tranny, which is a 25+ job and would cost more than buying a brand new transmission ($2,900).The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops. Therefore, the total cost of diagnosis and fixing the U0402 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.17 Nov 2019 ... 10R80 Trans Issues P0741 & P0744 Trans codes Valve body Issues 2018 Mustang GT TSB there is a TSB out for this issue for build dates ... To fix the automobile fault code p0734, start by checking the possible causes mentioned above. Then, visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors. This fix should take approximately 1.0 hour. OBD2 Diagnostic Trouble Code P0744 means that Torque Converter Clutch Circuit Intermittent has been detected. Carly Universal Scanner. iOS and Android enabled. All …What Repairs Will Fix P0744? Replace the torque converter clutch solenoid. Replace the torque converter or clutch. Change transmission fluid and filter. …

To diagnose the P0744 2003 Nissan Sentra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Two codes coming up on car even after fixing alot on car now need to figure out low cost ways to fix P0744 & P0722 code issues spent 1,800 on car & have spent 1,400 already in parts & labor. you need a better mechanic that traces ALL of the possibilities of each code, not just read the code and trow in a part hoping that it's fixed ~ it can be ...To diagnose the P0744 2005 Nissan Sentra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.3951 posts · Joined 2016. #4 · Dec 27, 2017. Perform the diagnostic procedure for the P0744 code as is listed in the factory service manual for your vehicle. Keep in mind of the broken pin issues if testing shows an open circuit for the TCC solenoid.24 Jun 2020 ... P0744 a descrição mais detalhada do erro. 713 views · 3 years ago ...more. OBD-2 codes ... Neil deGrasse Tyson Explains The Three-Body Problem.Diagnostic errors. When diagnosing DTC P0744, the following errors may occur: Incomplete electrical circuit diagnostics: Testing only the torque converter lockup clutch solenoid valve itself without testing the entire electrical circuit may miss potential problems with wires, connectors, or other components in the circuit.; Ignoring the …However, some of the most common quick fixes for a P0607 OBD2 trouble code include: Rerouting your car’s ECM wire harness. Replacing the battery together with the battery cables. Resetting the ECM’s trouble codes. Updating or reprogramming the ECM’s software.Meaning. The TCC creates a one-to-one connection between the engine and the transmission. This connection ensures that the car runs smoothly and gets good gas mileage. Without the TCC, the engine would have to work a lot harder to generate forward momentum. If the TCC slips, that can trigger code P0742. However, it usually happens a few times ...dfields326. 1 post · Joined 2024. #5 · Mar 12, 2024. P0744 = your tran is screwed , time to get another transmission. Share.To diagnose the P0744 2008 Nissan Rogue code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.The P0747 code is a diagnostic trouble code (DTC) that appears when the powertrain control module (PCM) detects an issue with the electronic pressure control solenoid. The electronic pressure control solenoid is responsible for regulating the hydraulic pressure in the transmission. When this solenoid fails, it can lead to a wide range of ...To diagnose the P0732 Ford code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

Symptoms of a P0742 include: Check engine light. Erratic, delayed or harsh shifts. Engine stalls when coming to a stop. Transmission shudders/shakes when coming to a stop or accelerating. Transmission gets stuck in a gear. Vehicle won’t move when in gear. Lower MPG. Transmission overheats.

If your "Service Engine Light" comes on and your told it's a P0447 "Evap Purge Valve Stuck Open" code, this is how to fix it cheap.Raise the vehicle, and then drain the CVT fluid by removing the drain plug. Remove the engine under cover if needed. WARNING: Use caution when looking into the drain hole as there is the risk of fluid entering the eye. 6. Remove the oil pan mounting bolts, and then remove the oil pan and oil pan gasket.Nov 16, 2010 · SOURCE: I have a code P0420 on my 2005 Nissan Altima..Is. the code points a catalytic conveter failing. alot of times they are replaced when the reason for the code is something else so a complete diagnistic should be performed before replacing. There is fairly new procedure to determine if the cat really is bad. Its called mode 6. 8 Aug 2021 ... 6:42 · Go to channel · Code P0744 P0845 nissan altima 2.5 2008 #transmission cvt. HECTOR ELECTRONICS REPAIR•18K views · 1:34 · Go to chan...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...To fix the automobile fault code p0734, start by checking the possible causes mentioned above. Then, visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors. This fix should take approximately 1.0 hour.Re: Finally a code - P0744. Post by Rogue One » Thu Sep 10, 2020 7:00 pm. Transmission failure in the 2008 Nissan Rogue typically occurs at around 124,000 miles and costs about $3,190 to fix. The most common solution is to replace the entire CVT transmission, which is an expensive fix, but needs to be done in order to prevent your car from ...

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OBD-II Code P0744 means that the Torque Converter Clutch Circuit is experiencing intermittent issues. The Torque Converter Lockup Clutch creates a solid conn...The P0411 may be caused by an array of malfunctions in the vehicle’s emission control system, the most popular causes implicated with this include; Failure of the air injection pump. Defective air pump relay or air pump clutch. Defective air control solenoids or airlines. Excessive carbon build-up in the air injection system.When the torque converter clutch solenoid valve is faulty, it could also lead to a p1744 code. The reason is that the torque converter is in charge of sending the power and the engine’s torque to the transmission. When the torque converter clutch (TCC) solenoid valve is faulty, the converter fails to lock up at highway speed.Has your check engine light recently turned on? Are you seeing the dreaded error code P0420 on your vehicle’s diagnostic scanner? Don’t panic just yet. Code P0420 is a common issue...How do I fix code P0744? There is no one-size-fits-all answer to this question, as the causes and solutions for the P0744 OBD code can vary greatly. However, some potential fixes could include: Replacing or repairing the solenoid pack assembly; Cleaning the torque converter and the torque converter clutch wiringP0744: TORQUE CONVERTER (Torque converter clutch circuit intermittent) The torque converter slip speed is at or above a set value (40 rpm + (Vehicle speed / 2) continuously for 30 seconds or more under the following diagnosis conditions: Diagnosis conditions. Selector lever: “D” position; Accelerator pedal position: 1.0/8 or moreOct 22, 2015 · If the transmission shifts normally you may be able to fix the problem by replacing the torque converter lock up solenoid. P0744 occurs when the torque converter does not engage. This can be caused by a internal transmission fault, failed torque converter, or a bad solenoid. Thanks. William. P0744: TORQUE CONVERTER (Torque converter clutch circuit intermittent) The torque converter slip speed is at or above a set value (40 rpm + (Vehicle speed / 2) continuously for 30 seconds or more under the following diagnosis conditions: Diagnosis conditions. Selector lever: “D” position; Accelerator pedal position: 1.0/8 or moreTo diagnose the P0744 2005 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Labor: 1.0. To diagnose the P2859 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.This code is usually caused by low transmission fluid, dirty fluid, a faulty Torque Converter Clutch (TCC) Solenoid Valve, or issues with the wiring harness or electrical connection. … ….

Jun 30, 2020 · What Does the P1701 Nissan Code Mean? When the power supply to the Transmission Control Module (TCM) is cut "OFF", for example, because the battery is removed, and the self-diagnostics memory function stops, the malfunction is detected and the Diagnostic Trouble Code (DTC) will set. P1701 Nissan Code - Transmission Control Module Power Supply. Cadillac vehicles are known for their luxurious design, advanced features, and powerful engines. However, like any other vehicle, they can encounter issues from time to time. When ...The code is often caused by low transmission fluid level, dirty transmission fluid, a faulty TCC solenoid valve, or issues with the wiring harness or electrical connections. To fix the problem, visually inspect the wiring harness and connectors for any damage, and check for broken or corroded pins.Raise the vehicle, and then drain the CVT fluid by removing the drain plug. Remove the engine under cover if needed. WARNING: Use caution when looking into the drain hole as there is the risk of fluid entering the eye. 6. Remove the oil pan mounting bolts, and then remove the oil pan and oil pan gasket.Labor: 1.0. To diagnose the P2859 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Looking at this 2012 Nissan Rogue customer complaint was at highway speeds vehicle would stay at 4000 rpms and lose power. Dropped the transmission pan and f...A Dupli-Color paint chart is used to match automobile paint colors using make, model and color code. Car diagrams provide instructions on where to find the color codes, which match...If you are driving a car with an automatic transmission, reading the code P0732 can be a cause for concern.It’s one of the most common codes in such vehicles, but regardless of that, the P0732 code meaning is still a mystery to most drivers.. Our team of automotive experts has decided to help you uncover all the important facts about this …Labor: 1.0. To diagnose the P1757 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.P0734 code definition. A P0734 trouble code indicates that an abnormality has been detected in the gear ration of one of the automatic transmissions gears, causing the storage of a code in the Powertrain Control Module (PCM) and illumination of the Check Engine Light. Related codes include P0729, P0730, P0731, P0732, P0733, P0735, and P0736. How to fix code p0744, To diagnose the P0744 Mercedes-Benz code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., As it pertains to code P0741, your vehicle has detected that the TCC is performing outside of normal specifications, which can also result in the display of any similar code, ranging from P0740-P0744., Labor: 1.0. The cost to diagnose the P0744 2011 Nissan Rogue code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., Code P0440 causes the Check Engine Light to go on, and this alone will cause a failed emission test. This is a pretty serious issue. The code means the fuel vapor system has a vapor leak somewhere. This needs to be fixed immediately because vapors can be very flammable and also dangerous to breath in. The loss of vapors in the system only means ..., Table of Contents. What Does Code P0744 Mean? Where is the P0744 sensor located? What are the common causes of code P0744 ? Get Help with P0744. What Does Code P0744 Mean? NOTE: While this guide is specific to Nissan vehicles, P0744 is a generic OBD2 diagnostic code., Here are the steps to diagnose the P0732 code for Gear 2 Incorrect Ratio: Connect an OBD scanner to the vehicle’s OBD port. Start the engine and turn on the scanner. Select the appropriate vehicle make, model, and year. Retrieve the diagnostic trouble codes (DTCs) from the vehicle’s powertrain control module (PCM)., What is the Cost to Diagnose the Code? Labor: 1.0. The cost to diagnose the P0744 2006 Infiniti G35 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. , Labor: 1.0. To diagnose the P1701 Nissan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Labor: 1.0. The cost to diagnose the P0744 2011 Nissan Rogue code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., Understanding Code P0744 If you are driving a car and notice that your engine light has come on, you may start to worry. ... How to Fix Code P0744: A Step-by-Step Guide. Leave a Comment / By Hafid / 03/04/2023 . Understanding Code P0744., If that doesn’t fix the code, the problem is likely deeper within the transmission. In rare cases, the problem could be with the transmission control module sensor. If it’s faulty, you can replace the TCM. Related Codes. Code P0743 – Torque Converter Clutch Circuit Electrical. Code P0744 – Torque Converter Clutch Circuit Intermittent., Meaning. A P1778 code is a Nissan diagnostic trouble code that occurs when the PCM/ECM receives a signal indicating a problem with the step motor function. The four stages of the step motor have several variations depending on the signal sent by the TCM (Transmission Control Module). As a result, the flow of line pressure to the primary pulley ..., The best way to fix the P0733 code is to have your vehicle diagnosed by a qualified mechanic. The root cause of the issue may be a faulty solenoid or valve body, low transmission fluid levels, or a damaged torque converter. Once the underlying issue has been identified, the mechanic can perform any necessary repairs to get your vehicle back …, Jan 18, 2011 · Two codes coming up on car even after fixing alot on car now need to figure out low cost ways to fix P0744 & P0722 code issues spent 1,800 on car & have spent 1,400 already in parts & labor. you need a better mechanic that traces ALL of the possibilities of each code, not just read the code and trow in a part hoping that it's fixed ~ it can be ... , What repairs can fix the P0744 code? There are many ways that a technician can address a P0744 code, including: Checking and replacing transmission fluid; if the fluid is found to be very dirty, flushing the system and replacing the torque converter may be required. Checking and replacing any shorted or faulty wiring, connectors, and circuitry., To fix the P0732 fault code, start by checking the transmission fluid level and ensuring it is at the correct level. Next, inspect the transmission fluid for any dirt or contamination. If the fluid is dirty, it may need to be replaced. Additionally, check the shift solenoids and their wiring harness for any issues such as open circuits or poor ..., 1. Refer to the Repair Flow Chart on page 2 for CVT repair. 2. Perform Additional Service when replacing a control valve (valve body) on page 19 or when replacing a CVT assembly on page 18. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE ..., Fixing Nissan Code P0744. Once the cause of Nissan Code P0744 is identified, appropriate measures can be taken to resolve the issue. Possible solutions include: Repair or replace the TCC solenoid: If the solenoid is found to be faulty, it can be repaired or replaced. Repair or replace damaged wiring: Any damaged wiring connected …, Is your Maytag dryer not heating up? If so, don’t panic just yet. There are several common causes for this issue, and in most cases, you can easily fix it yourself without the need..., Labor: 1.0. The cost to diagnose the P0744 2011 Nissan Rogue code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., To diagnose the P0744 2005 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Jun 29, 2015 · Re: Finally a code - P0744. Post by Rogue One » Thu Sep 10, 2020 7:00 pm. Transmission failure in the 2008 Nissan Rogue typically occurs at around 124,000 miles and costs about $3,190 to fix. The most common solution is to replace the entire CVT transmission, which is an expensive fix, but needs to be done in order to prevent your car from ... , 3 posts · Joined 2017. #1 · Nov 7, 2017. Hello, my sister's 2012 Rogue with 130000 miles, threw code P0744. I don't think she has ever had the trans fluid or filter changed. Would changing the filter and fluid fix this issue, or is she looking at a bigger issue?, Diagnostic trouble code(DTC) P1744 is a manufacturer-specific code (usually used by Ford) that stands for “Torque Converter Clutch System Performance.”. This code is logged when the vehicle’s PCM detects a problem with the application of the torque converter clutch (TCC). See also P0731 Code: Gear 1 Incorrect Ratio. , Labor: 1.0. To diagnose the P0744 2013 Nissan Rogue code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and …, 26 Apr 2018 ... If you have a stored trouble code P0741 for your TCC solenoid or the torque converter clutch solenoid I will show you how to activate the ..., 3 posts · Joined 2017. #1 · Nov 7, 2017. Hello, my sister's 2012 Rogue with 130000 miles, threw code P0744. I don't think she has ever had the trans fluid or filter changed. Would changing the filter and fluid fix this issue, or is she looking at a bigger issue?, Raise the vehicle, and then drain the CVT fluid by removing the drain plug. Remove the engine under cover if needed. WARNING: Use caution when looking into the drain hole as there is the risk of fluid entering the eye. 6. Remove the oil pan mounting bolts, and then remove the oil pan and oil pan gasket., Technical description and explained code P0744. Diagnostic Code P0744 is set when the PCM or TCM detects an intermittent signal in the electronic pressure control solenoid valve circuit. Computer controlled automatic transmissions use variable hydraulic pressures to shift gears and operate the torque converter clutch (TCC). , Misdiagnosis of the torque converter clutch wiring is the most common cause of the P0744 code. Most technicians replace lock up solenoids or torque converters without considering wiring issues. After each repair attempt, the P0744 code should be cleared and the system should be retested. , After a bit of advice, we have a 2009 Murano AWD with 119,000 miles on, a couple of days ago the engine light came on so I read the codes and was getting P0744 Torque Convertor, car was driving fine with no issues so i cleared the code and drove the car again with no issues. Used it again today end the light came back on, cleared the code again ..., How much to fix each issues with my car? 5 Answers p1320-Ignition Signal p0325-Knock Sensor 1 Circuit bank 1 p0306-Cylinder 6 Misfire p0440-EVAP emission control system malfunction p1400-Exhause gas …, Technical description and explained code P0744. Diagnostic Code P0744 is set when the PCM or TCM detects an intermittent signal in the electronic pressure control solenoid valve circuit. Computer controlled automatic transmissions use variable hydraulic pressures to shift gears and operate the torque converter clutch (TCC).