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GM OBD Trouble Code 36

Mass Air Flow Sensor Error
24x Crankshaft Position Sensor Circuit Error
4T60-E Shifting Error

  • Depending on the model, code 36 can refer to three different systems.
  • Please choose from one of the above links for specific information on each system.

Mass Air Flow Sensor Error

The ECM receives a signal from the Mass Air Flow sensor depending on the amount of air entering the engine. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.

Fault Code Description

  • 36 - Mass Air Flow sensor error

Symptoms

  • Engine stalling
  • Lack of power

Common Problems

  • Faulty Mass Air Flow sensor
  • Broken wire to Mass Air Flow sensor
  • Dirty sensing element in Mass Air Flow sensor

24x Crankshaft Position Sensor Circuit Error

The ECM receives a signal from the Crankshaft Position sensor depending on the engine speed. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.

Fault Code Description

  • 36 - 24x Crankshaft Position sensor circuit error

Symptoms

  • Engine may not start
  • Engine stalling

Common Problems

  • Faulty Crankshaft Position sensor
  • Damage wiring to Crankshaft Position sensor

4T60-E Shifting Error

The ECM monitors the transmission shifting performance. Code 36 will set if the shifting performance does not meet factory specializations.

Fault Code Description

  • 36 - 4T60-E Shifting error

Symptoms

  • Transmission stuck in "fail safe" mode
  • Erratic transmission shifting

Common Problems

  • Blown transmission fuse
  • Internal transmission fault

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