Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P021868

Condition

Note! This diagnostic trouble code (DTC) status is an event controlled diagnostic trouble code (DTC). An event controlled diagnostic trouble code (DTC) does not mean that there is a fault in the control module when it is active, but is designed as information.

The oil temperature sensor provides the Transmission control module (TCM) with a signal that is used, among other things, for the temperature controlled lock-up and engagement high temperature program functions.
If the Transmission control module (TCM) registers that oil temperature in the transmission is too high, a signal is transmitted to the Engine control module (ECM) to reduce the engine's torque. This is to protect the gear box from too high load, which can result in internal mechanical faults.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The gear box oil temperature has been greater than 135 °C for longer than 1 minute.
- The output speed from the gearbox exceeds 5726 rpm (approximately 140 km/h).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Normal driving.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- The engine limits the torque until the gear box oil temperature has dropped below a certain level.

Possible source
- The gear box oil has had too high a temperature for too long.

Fault symptom[s]
- Message in information display