OBD-II code · Powertrain (generic, extended)
P262A Fuel Injector - Pilot Injection Not Learned
The pilot (pre) injection learning routine on a common-rail diesel did not complete successfully. Without learned pilot quantity, combustion noise increases and NOx may rise.
Is it safe to drive with P262A?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInjector flow drift outside learning window
- PossibleUnstable rail pressure during learning cycle
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Injector, High Pressure Pump, Control Module
Related codes
- P2627O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1
- P2628O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
- P2629O2 Sensor Pumping Current Trim Circuit / Open Bank 2 Sensor 1
- P262BControl Module Power Off Timer Performance
- P262CSensor Reference Voltage G Circuit / Open
- P262DSensor Reference Voltage G Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.