DTC ECM-35X3

Condition







Diagnostic trouble code (DTC) ECM-35x3 is stored at start up if the engine control module (ECM) detects that a cylinder misfires during the first 1000 revs of the engine.

Diagnostic trouble code (DTC) ECM-35x3 emission effect or ECM-35x3 three-way catalytic converter (TWC) damage is stored (depending of the seriousness of the misfire) if the engine control module (ECM) detects misfiring after the first 1000 revs after engine start up.

The diagnostic trouble code (DTC) indicates which cylinder is misfiring.

Substitute value
- Three-way catalytic converter (TWC) diagnosis shut off
- Leakage diagnosis shut off
- Rear heated oxygen sensor control shut off
- Fuel trim switched off.

Possible source
- Defective spark plug
- Blocked/leaking injector
- Uneven compression
- Air leakage
- Faulty fuel pressure
- Low fuel level
- Water in the spark plug wells
- Contaminated or incorrect fuel
- Repeated cold starting where the engine coolant temperature (ECT) has reached normal operating temperature between starts
- Incorrect oil grade (summer fuel in winter, certain markets).

Fault symptom[s]
- The malfunction indicator lamp (MIL) flashes
- The engine misfires
- The engine is difficult to start
- Deterioration in performance
- Uneven idle
- The engine is not firing on all cylinders.