High Pressure Fuel Pump Calibration Not Learned/Programmed
After high-pressure pump replacement the engine controller did not receive the pump-specific calibration data. Rail pressure regulation runs from default values.
Affected components
- High pressure pump
- Control module
Common causes
- High likelihood: Pump calibration codes not entered after replacement
- Medium likelihood: Programming session aborted before completion
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
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.