P0038 Code:

OBD-II Diagnostic Powertrain (P) Trouble Code

Possible Cause

P0038 leads to an unsuccessful repair. Engine misfire codes, lean exhaust codes, fuel injector codes, and virtually any other drivability or transmission code that is accompanied by a controller communication code can potentially be a pitfall for misdiagnosis.

Common Symptoms

  1. The CAN represents a communication bus that allows multiple microcontrollers to communicate with one another without the need for a host computer
  2. Should all system circuitry and sensors check out and the transmission is in good working order, suspect a faulty PCM but keep in mind that PCM failure is rare and PCM replacement will require reprogramming.
  3. This signal is systematically forwarded to affected control modules that utilize the data to accomplish various other tasks
  4. Individual control module failure is rare but possible

Similar Problems

Accelerator Pedal Position (APP) Sensor 1 Performance
Crankshaft Position Sensor Circuit Performance
Kick-Down Switch Failed Short

P0038 Troubleshooting

Broken engine mountings can cause banging and graunching noises. There are two main types of mounting those centrally placed close to the bottom of the block and those higher up the block which mount on to the inner wings or chassis members. P0038 OBD 2 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

How to turn off P0038 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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