Cold Start Cylinder 4 Injection Pulse Performance
During cold start, the ECM detects that the injection pulse on cylinder 4 does not produce the expected combustion result. Cold-start specific pulse calibration deviates from learned values.
Affected components
- Fuel injector cyl 4
- Cold start calibration
Common causes
- High likelihood: Injector behaviour drifts at low temperature
- Medium likelihood: Poor fuel atomization at cold start
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.