P2758 OBD Error Code: Problem & Solutions

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The trouble code P2758 can be elucidated as Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On. A solid connection is created between the car engine and the transmission by the torque converter lockup clutch. Now if the transmission control

module would detect some faults in the proper working of the torque converter clutch, then the P2758 fault code would start appearing.

Want to learn something more about the P2758 fault code? The torque converter clutch pressure control solenoid signal is being monitored by the engine control module. This trouble code would be set by the ECM when the torque converter clutch pressure control solenoid signal would not be as per the specifications set by the manufacturer. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On?

• There can be inoperative torque converter clutch pressure control solenoid
• There can be opened or shorted torque converter clutch pressure control solenoid harness
• Torque converter clutch pressure control solenoid circuit inferior electrical connection

1. Intake Valve - An Intake Valve is a spring action valve that is placed on a cylinder head of an internal combustion engine just next to the spark plug and exhaust valve. Its main purpose is to allow the proper amount of air-fuel mixture to enter inside the cylinder when the complete movement cycle of piston from TDC (top dead center) to BDC (Bottom Dead Center) and back to TDC takes place. Thus, replace damaged valve today!
2. Engine Control Module - Most of the time it is difficult to intercept the ECM faults and thus must be checked for thoroughly. There can be a problem with the circuit or the software might have malfunctioned. Thus repair, replace or reprogram the component as per requirement.
3. Powertrain Control Module - If the PCM is faulty, it can stores wrong OBD codes and can lead to misdiagnosis. This can happen due to misinterpretation of data received from the various sensors and components which also affects the vehicle’s performance. Thus, replace it immediately.
4. Automatic Transmission Module - A defective transmission module will affect the gear shift mechanism and also affected during acceleration and deceleration. This will lead to affected engine performance and fuel delivery system. Thus, replace faulty transmission module now!
5. Electronic Control Unit - If the ECU is at fault, it will not be able to read the boost converter temperatures correctly leading to underperformance. Thus, replace faulty ECU now!
6. Diagnostic Tool - Choose from our diagnostic tools collection that will come in handy to detect and correct the OBD error code.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The service engine soon light can start lighting up
• Auto transmission not shifting properly
• An increase in the fuel consumption

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• Repair or replace the quirky torque converter clutch pressure control solenoid circuit
• Rehabilitate the defaults in the PCM/ECM
• Carefully adjust the faults in the torque converter clutch pressure control solenoid harness
• Adjust the flawed torque converter clutch pressure control solenoid

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of pcm, ecm, torque converter, transmission control module, torque converter solenoid, torque converter clutch pressure control solenoid, auto transmission shift solenoid, pcm module, ecm module, torque converter clutch solenoid and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

Willing to diagnose the P2758 error code successfully? Then you will need a scanner and a digital volt/ohmmeter. Generally, every vehicle with an automatic transmission produced since the mid-eighties is equipped with some type of computer controlled automatic transmission system. A sophisticated computerized control system is utilized by the OBD-II equipped vehicles that calculates a number of engine drivability inputs with vehicle speed inputs, engine/turbine speed inputs, and transmission output speed inputs to determine the desired gear ratio necessary to achieve maximum fuel efficiency, to optimize engine performance, and provide the greatest engine and transmission longevity. The input data is calculated by the powertrain control module and initiates upshifting and downshifting by using strategically designed shift solenoids to actuate fluid transfer between the hydraulic circuits of each set of corresponding gears. If there are a lot of stored shift solenoid codes then it would indicate that a transmission component slipping or delayed engagement condition has occurred. The automatic transmission uses a high-pressure pump to circulate fluid through the transmission hydraulic circuits in the transmission housing and valve body. Now if the transmission pressure is not sufficient enough to actuate gear changes, this type of code might exist. Insufficient fluid pressure is most often caused due to less or grubby transmission fluid condition. You must begin the transmission diagnosis with an inspection of the transmission fluid dipstick. Just make sure that the fluid level should be within manufacturer’s specified recommendations and that the fluid is in nice condition. Fluid that smells burned or unusual in any way should be considered inappropriate. If the fluid is burned, then it would indicate that the transmission has been operated during a low fluid level condition and may have experienced catastrophic internal mechanical failure. If the fluid smells or appears burned, then the transmission pan should be removed and inspect for the presence of clutch material and other debris. If such contaminants are present in the transmission pan, a total rebuild, fluid flush and replacement, and a new torque converter would be needed before the transmission will function correctly. If no debris is found in the transmission pan, then you should check all internal wiring and connectors. Search for shorted or burned wiring and replace circuitry and connectors as required. Most applications will require replacement of the full internal transmission harness if discrepancies are noted. If the system wiring, connectors, and components appear to be in normal working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data. The intermittent conditions can be diagnosed easily with the help of this information that may have contributed to this code being stored. Now once the codes have been cleared, operate the vehicle to see if the code returns. If the code fails to immediately return, then there is a situation of intermittent condition. Intermittent conditions can prove to be challenging to diagnose and in extreme cases may have to be allowed to worsen before a correct diagnosis can be made. Now if the transmission fluid is in decent shape, but the overall level of the fluid is less, then you should add enough fluid to locate a leak and repair it. Fill the transmission with fluid, allow the vehicle to reach normal operating temperature, and test drive it to see if the transmission operates normally and to determine whether the code will return. If the transmission operates normally and the code doesn’t return, then it was likely caused by transmission slippage due to a low fluid level/pressure condition. If the code is returning back again and the transmission slips or suffers from delayed engagement, check pump pressure using a manual pressure gauge. Obtain a hydraulic pressure diagram pertaining to the vehicle and thread the end of the gauge into the appropriate opening on the transmission housing to record pump pressure. Your findings should be compared with manufacturer’s specifications and make repairs as per the requirements. Typical causes of low pump pressure include clogged hydraulic passages, a defective pump, faulty shift solenoids, or a faulty electronic pressure regulator. There would be a need of transmission removal in the pump replacement and partial disassembly. If the code immediately returns, and the transmission seems to operate normally, then inspect for reference voltage and ground signals at the affected shift solenoid. If either the reference voltage or ground circuits are open, then a digital volt/ohmmeter should be used to check for continuity as well as resistance in all circuits. Repair or replace system circuits/connectors as required and retest the system to ensure that repairs were successful. Using the manufacturer’s wiring diagram for the affected shift solenoid, test all related circuits and the solenoid itself for resistance and continuity and compare your findings with manufacturer’s specifications. Repair or replace system circuitry, connectors, and/or components that fail to coincide with manufacturer’s specs. Always retest the system to ensure a successful repair. If all system circuits are intact connecting the scanner to the diagnostic connector and attempt to manually activate the shift solenoid/s. If the shift solenoid functions properly and all circuits coincide with manufacturer’s specifications, suspect a defective PCM. Just keep in mind that PCM failure is rare and it will require reprogramming during replacement. If the shift solenoid fails to activate manually, replace the solenoid (or solenoid pack) and retest the transmission control system.

Common Mistakes When Diagnosing The P2758 Code

• There can be some faults in the torque converter
• Negligence in the torque converter solenoid
• Wiring problems