P268B: High Pressure Fuel Pump Calibration Not Learned/Programmed
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P268B mean?
After high-pressure pump replacement the engine controller did not receive the pump-specific calibration data. Rail pressure regulation runs from default values.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
Common causes
- High Pump calibration codes not entered after replacement
- Medium Programming session aborted before completion
Likelihood is a general estimate across vehicles; your make and model may differ.
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