P2C59 code meaning
Cylinder 4 Fuel Injector B Offset Learning At Max Limit
Powertrain system Generic code P2Cxx codes Check engine light
What P2C59 means
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.
P2C59 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P2C59
- Check engine light
- Usually no change in how the car drives
- Possibly uneven idle or lean misfire on cylinder 4
Common causes of P2C59
- Most 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
- Less likelyAir leak at the intake runner of cylinder 4 (only where the learn uses exhaust oxygen)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injector b cyl 4ECM
What each part of P2C59 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| 59 | The exact fault in that area. |
What to do next
- Note P2C59 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2C59
What does P2C59 mean?
P2C59 means "Cylinder 4 Fuel Injector B Offset Learning At Max Limit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C59?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2C59 fail an emissions test?
Yes, it can. P2C59 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2C59 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will P2C59 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.