Powertrain, generic (extended)

P2C58 Cylinder 4 Fuel Injector B Offset Learning At Min Limit

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2C58 marks the minimum limit of the injector B offset on cylinder 4. Useful for diagnosis is a look at the A injector of the same cylinder: if P02D2 is stored as well, both valves seem to overdeliver, which points to something both learns share, such as the measurement or the cylinder itself, rather than to one injector. A lone P2C58 points to injector B, for example a seat that drips after shut-off and makes hot restarts long or the first seconds rough. On a four-cylinder engine this is the last cylinder of the row. No manufacturer publishes this code; Volvo's Technical Journal 36016 lists only the opposite code P2C59 for cylinder 4. Detection of an adaptation at its limit is demanded by CARB 1968.2 (e)(6.2.2).

Likely causes

Injector B of cylinder 4 leaking at the seat and adding fuel after closing

Replacement injector of a different flow rating or not matched to the engine software

Learned values or engine software not up to date (Volvo pairs an update with an adaptation reset for the related Max codes)

Supply pressure on this injector set higher than the model assumes (regulator)

Symptoms

Check engine light
Often nothing else noticeable
Long hot start or rough first seconds, possibly misfire on cylinder 4
Possibly fuel smell or higher consumption

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–900

Time0.5–4 h

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

Parts involved

fuel injector b cyl 4ecm

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