Clogged, dirty, or worn fuel injector on cylinder 8 (injector 'B'); Faulty or damaged electrical connector or wiring to the cylinder 8 injector; Internal PCM calibration issue or software glitch requiring reflash; Low fuel pressure or volume affecting injector performance; Mechanical engine issue such as low compression or a faulty lifter on cylinder 8; Contaminated fuel or fuel system deposits; Aftermarket or incorrect injector installed previously

DTC codes / P2Cxx · Hybrid propulsion / P2C61

P2C61Cylinder 8 Fuel Injector B Offset Learning At Max Limit

Q: What does code P2C61 mean?

Cylinder 8 Fuel Injector B Offset Learning At Max Limit. P2C61 indicates that the powertrain control module (PCM) has learned a fuel injector offset correction for cylinder 8's 'B' injector that has reached its maximum allowable limit. The computer can no longer compensate for the injector's flow characteristics within its programmed range, which typically points to a worn or clogged injector, a wiring issue, or a mechanical fault affecting that cylinder.

P2C61 indicates that the powertrain control module (PCM) has learned a fuel injector offset correction for cylinder 8's 'B' injector that has reached its maximum allowable limit. The computer can no longer compensate for the injector's flow characteristics within its programmed range, which typically points to a worn or clogged injector, a wiring issue, or a mechanical fault affecting that cylinder.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illuminated check engine light, often with no other symptoms besides the warning light
Rough idle or misfire sensation, especially when the engine is cold
Slight hesitation or stumble during acceleration
Decreased fuel economy
Elevated hydrocarbon emissions or a fuel smell from the exhaust
In rare cases, a noticeable loss of power under load

Common causes, most likely first

Clogged, dirty, or worn fuel injector on cylinder 8 (injector 'B')
Faulty or damaged electrical connector or wiring to the cylinder 8 injector
Internal PCM calibration issue or software glitch requiring reflash
Low fuel pressure or volume affecting injector performance
Mechanical engine issue such as low compression or a faulty lifter on cylinder 8
Contaminated fuel or fuel system deposits
Aftermarket or incorrect injector installed previously

How to diagnose and fix it

Verify battery voltage and inspect the cylinder 8 injector connector and wiring for corrosion or damage
Check fuel pressure and volume against manufacturer specifications
Perform a cylinder contribution test or injector balance test to confirm the affected injector
Run a fuel injector cleaning service or use a quality injector cleaner additive
Swap the cylinder 8 injector with a known-good injector from another cylinder to see if the code follows
If the code persists, replace the cylinder 8 injector with a new OEM-quality unit and perform a pilot learn or injector offset reset
Check for updated PCM software and reflash if applicable

What the offset learning limit really means

The offset learning value is a correction factor the PCM applies to the injector's base pulse width; hitting the max limit means the PCM has run out of adjustment range, not necessarily that the injector has failed completely.
A dirty injector can cause this code without setting a misfire code, so technicians who only look for misfires may miss it.
Fuel quality and pressure are critical; low fuel pressure can mimic a failing injector and lead to unnecessary replacement.
The code may be stored intermittently due to a poor electrical connection that tests fine when the harness is wiggled, so a thorough wiggle test is essential.
On some vehicles, this code can be set by a faulty PCM driver circuit, so don't rule out the computer until wiring and injector have been ruled out.

Can I keep driving with P2C61?

You can usually continue driving short distances, but avoid heavy acceleration or towing until the fault is repaired. Prolonged driving with a rich or lean condition on one cylinder can damage the catalytic converter or spark plugs, so schedule diagnosis soon.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.