Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-131C

Condition




The engine control module (ECM) checks the signal for the intake air temperature.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal for the intake air temperature corresponds to a temperature that is higher than a certain value.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute value
- Predefined value for intake air temperature
- Three-way catalytic converter (TWC) preheating and idle air trim diagnostics are disabled.

Possible source
- Contact resistance in the terminals
- Open-circuit in the signal cable
- Short-circuit to supply voltage in the signal cable
- Damaged intake air temperature (IAT) sensor.

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