P0956 - OBD Trouble Code

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The trouble code P0956 can be elucidated as Auto Shift Manual Mode Circuit Range/Performance. A voltage signal is received by the PCM/TCM to decide the transmission operating pressure or when a shift is happening. This error code would start triggering up when the auto shift manual mode circuit would not match usual operating voltages stored in the memory of the PCM/TCM's.

Want to learn something more about the P0956 fault code? This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.

What causes this problem with the Auto Shift Manual Mode Circuit Range/Performance?

• Imperfect auto shift manual switch
• Unbolted auto shift manual switch harness
• Unacceptable electrical connection in the auto shift manual switch circuit

1. Auto Transmission Shift Solenoid - Defective Auto Transmission Shift Solenoid can be a major reason why P0956 code depicts. So make sure to replace it online so that you don’t have to face any further issues.
2. Gear Shift Extension - Everything is okay with the Auto Transmission Shift Solenoid and still OBD code P0956 triggering? Then there must be some defects in Gear Shift Extension. Replace them as soon as possible.
3. Body Control Module Component - P0956 code flashing? Get your Body Control Module Component inspected from a mechanic.
4. Engine Control Module - If everything is alright with Body Control Module Component, then there is surely some defect in Engine Control Module. Get it replaced before the situation gets worse.
5. Powertrain Control Module - P0956 code can display due to some faults in the Powertrain Control Module. So it is very important to replace the Powertrain Control Module with us at equitable prices.
6. Electronic Control Unit - Do you remember when was the last time you got your car Electronic Control Unit checked up? A dirty Electronic Control Unit can cause a lot of issues like displaying P0956 code.
7. Auto Transmission Control Module - Poor Auto Transmission Control Module can cause a lot of difficulties, so why not get it replaced at time?

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

• Inoperative autostick shifting
• The service engine soon light can start lighting up

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:

• Rehabilitate the quirky PCM
• The faulty auto shift manual switch should be repaired or replaced as per the need
• Recondition the non-functioning auto shift manual switch harness
• It is necessary to perform proper service of the unsound auto shift manual switch circuit
• Adjust the flawed electrical connection

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

• As an initial step the mechanic will carefully inspect the vehicle with the help of a scanner.
• After this, the technician will connect a scanner to the diagnostic code so that he can recover all the codes and freeze frame data.
• Note down this information as it can clearly help for further diagnosis.
• The mechanic will also inspect the shift solenoid to find if it is disconnected or if any other faults persist.
• After careful inspection, he will reset the code and test drive your vehicle to check for reappearance of the codes.
• He will know that an intermittent condition persist, if the code does not return instantly.
• But if the error code returns quickly, the vehicle is test driven, and then he has to inspect the transmission fluid.
• The transmission fluid can be dirty or there can be any blocks in the transmission filter which can be replaced instantly.
• At times, the fluid level will be insufficient which has to be fixed immediately. If he comes across any leaky areas, he will fix them too. Once the fluid is checked for appropriate level, then every other components like wires and connectors have to be checked for possible damages.
• If any of the component is damaged, the mechanic will replace them quickly.
• In this scenario, the error code mostly arises due to a dirty transmission fluid where it can also be contaminated or the shift solenoid is broken.
• Most often, whenever the mechanic carries out any repair work, he will reset the code and test drive your car, to check if the codes return immediately. This can preferably help the mechanic to know what caused this error code in the vehicle.

Common Mistakes When Diagnosing The P0956 Code

• There can be some defects in the powertrain control module
• Autostick shift switch might start failing
• Some issues related to the wiring