Powertrain, generic (extended)

P2C55 Cylinder 2 Fuel Injector B Offset Learning At Max Limit

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2C55 reports that injector B of cylinder 2 needs the maximum offset the engine control allows: even with the longest permitted extension of its pulse it underdelivers. Volvo lists it in Technical Journal 36016 for 2022 model-year cars with engine variants L1 and 06. Version 4.0 of August 2021 still asked for model-specific special software, version 5.0 from September replaced that with a regular software release available from week 37 of 2021, again followed by an adaptation reset in VIDA. Cars treated before week 34 that showed the codes again had to be updated once more. Outside Volvo, a varnished or partly blocked injector, a high-resistance connector or, where the learn uses exhaust oxygen, a leak at the intake runner of cylinder 2 can drive the value up.

Likely causes

Engine software (Volvo TJ 36016: update, then reset injector adaptations in VIDA)

Varnish or deposits in injector B of cylinder 2, slow opening

Corroded or loose connector, chafed wire or voltage drop at this injector

Air leak at the intake runner of cylinder 2 (only where the learn uses exhaust oxygen)

Symptoms

Check engine light
Usually no change in how the car drives
Possibly uneven idle or lean misfire on cylinder 2

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–700

Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injector b cyl 2ecm

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, patents.google.com.