Powertrain, generic (extended)

P2C57 Cylinder 3 Fuel Injector B Offset Learning At Max Limit

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2C57 is the upper-limit counterpart for injector B on cylinder 3. A Ford patent on engines with two injector types explains why each injector needs its own learned offset: it is the time needed to overcome the inertia of the pintle and of the driver circuit, and it shifts with battery voltage and temperature. A valve that opens late, a corroded connector that drops voltage or deposits in the nozzle therefore push the correction toward its maximum. Volvo is the one maker with a public bulletin for this code (TJ 36016, model year 2022), where it usually appears without symptoms and is cured by a software update plus an adaptation reset in VIDA. CARB 1968.2 (e)(6.2.2) is the regulatory basis.

Likely causes

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

Varnish or deposits in injector B of cylinder 3, slow opening

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

Air leak at the intake runner of cylinder 3 (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 3

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 3ecm

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