Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-201A

Condition
During the engine warm up phase the way the engine temperature should increase is calculated. Factors such as engine load and the start temperature are taken into account. This test takes place during the engine warm-up phase (under "normal operation") and continues until the engine temperature has reached 84 °C. For the test to start, the starting temperature of the engine must be below 35 °C, the outside temperature must be between -7 and +35 °C and at least 15 minutes must have passed since the engine was last run.
The diagnostic trouble code (DTC) is stored if the calculated increase in temperature does not correspond to the actual increase (measured by the engine coolant temperature (ECT) sensor).

Hint: This diagnostic trouble code (DTC) can also be caused by faults that store diagnostic trouble codes (DTCs) for outside temperature sensors.

Substitute value
- None.

Possible source
- Damaged engine coolant temperature (ECT) sensor
- Damaged thermostat.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.