Cold Start Injection Timing Performance
During cold-start the ECU adjusts injection timing (post-injection on diesels, intake-stroke timing on direct-injection petrols) to support catalyst light-off. The strategy does not deliver the expected timing - injector response slow or sensor offset.
Affected components
- Fuel injectors
- Cold start strategy
Common causes
- High likelihood: Injectors slow when cold
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.