Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-33X0

Condition




The engine control module (ECM) checks the primary circuit for the ignition coils using a signal from the diagnostic lead from the ignition coils. The diagnostic trouble code (DTC) is stored if the control module detects that the signal for an ignition coil is faulty.
The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute value
Fuel trim disabled.

Possible source
- Contact resistance or oxidation in the connector for the ignition coil
- Short-circuit to supply voltage or ground in the signal cable
- Open-circuit in the signal cable
- Open-circuit in the power cable
- Short-circuit to supply voltage or ground in the diagnostic lead
- Open-circuit in the diagnostic lead
- Damaged ignition coil.

Fault symptom[s]
- The engine misfires.