P2C59Cylinder 4 Fuel Injector B Offset Learning At Max Limit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2C59 tells that injector B of cylinder 4 has reached the maximum learned offset, so its delivery falls short even with the longest allowed correction. Volvo's Technical Journal 36016 includes it among four codes, one per cylinder from 1 to 4 and all at the Max limit, on 2022 model-year cars; the first step there is software, not parts. Outside such a bulletin, a swap test helps: move injector B of cylinder 4 to another cylinder, reset the adaptations and let the learn run again. If the Max code follows the injector, the valve is at fault; if it stays with cylinder 4, wiring, connector or the intake side of that cylinder are next. CARB 1968.2 (e)(6.2.2) treats an adaptation out of authority as a malfunction.
- What you may notice
- Check engine light
- Usually no change in how the car drives
- Possibly uneven idle or lean misfire on cylinder 4
- Likely causes
- LikelyEngine software (Volvo TJ 36016: update, then reset injector adaptations in VIDA)
- PossibleVarnish or deposits in injector B of cylinder 4, slow opening
- PossibleCorroded or loose connector, chafed wire or voltage drop at this injector
- RareAir leak at the intake runner of cylinder 4 (only where the learn uses exhaust oxygen)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.