Cold Start Injection Pulse Performance
During cold start, the ECM detects that the overall injection pulse performance does not match the calibrated cold-start strategy. Combustion stability is reduced during warm-up.
Affected components
- Fuel injectors
- Ecm
- Fuel rail
Common causes
- High likelihood: Injectors aged - flow drift across cylinders
- Medium likelihood: Fuel rail pressure drifts during pulse
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.