Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-33X0

Condition




The engine control module (ECM) checks the signal cable for the ignition coil primary winding. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the signal for the ignition coil primary winding is too high, too low or missing.
The diagnostic trouble code (DTC) indicates which ignition coil is being referred to.
The diagnostic is active when the engine is running.

Substitute value
None.

Possible source

Signal too high
- Short-circuit to supply voltage in the signal cable.

Signal too low
- Short-circuit to ground in the signal cable.

Signal missing
- Open-circuit in the signal cable
- Contact resistance in the terminals.

Fault symptom[s]
- Engine not firing on all cylinders
- Malfunction indicator lamp (MIL) lit.