Injection Pump Timing Calibration Not Learned
The injection pump timing learning routine did not complete successfully. Without learned values, injection timing runs from default tables and combustion is suboptimal.
Affected components
- Injection pump
- Control module
Common causes
- High likelihood: Learning routine aborted by other DTC or unstable conditions
- Medium likelihood: Timing actuator drift outside learning window
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.