P2C60

Code

Generic P — Powertrain

Cylinder 8 Fuel Injector B Offset Learning At Min Limit

Brand: Generic

Type: P — Powertrain

Views: UK: 18 EN: 24 RU: 21

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty or low-flow fuel injector on cylinder 8 (Bank B)
Injector sticking shut or partially clogged
Open/short/poor connection in injector wiring or connector
Faulty driver in the powertrain control module (PCM/ECM)
Low or unstable fuel rail pressure or fuel supply problem
Incorrect injector installed or wrong injector coding

Symptoms

MIL (Check Engine Light) illuminated
Rough idle or vibration, especially at idle or low load
Misfire feel or misfire code(s) for cylinder 8 (occasionally P0308)
Reduced power, poor drivability, or increased fuel consumption
Possible hard starting or extended crank time

What to check

Scan for freeze frame data and related codes (misfire, fuel trim, fuel pressure)
Monitor learned injector offset/trims and compare to other cylinders
Visual inspection of injector connector, wiring harness, and ground points
Measure injector resistance and compare to manufacturer specification
Capture injector waveform/current trace with an oscilloscope or noid light
Check fuel rail pressure (static and under load) and fuel delivery

Signal parameters

Injector resistance: should match manufacturer spec (typical ranges: low-impulse 1–6 Ω or high-impulse 12–16 Ω — confirm exact spec)
Injector pulse width: typically 1–5 ms at idle (varies by engine/load)
Injector driver voltage: pulsed 0–12 V (MOSFET driver) and corresponding current waveform
Fuel rail pressure: within vehicle-spec range (consult service manual for target pressure and tolerance)
PCM learned offset/trims: value at or near minimum limit as reported by scan tool

Diagnostic algorithm

Retrieve all DTCs and freeze-frame data. Note related codes (misfires, fuel pressure, communications).
Using a scan tool, view learned injector offsets/trims for all cylinders and confirm cylinder 8 (Bank B) is at the minimum limit.
Visually inspect injector 8 wiring, connector, and ground. Repair any damaged wiring or loose connections.
Measure injector resistance at the connector and compare to spec. If out of range, replace injector.
Backprobe injector while cranking/idle and confirm injector pulse and driver behavior with an oscilloscope or noid light. Look for abnormal waveform (no current ramp, clipped waveform, or no pulse).
Check fuel rail pressure (static and during cranking/drive). Repair fuel supply issues if pressure is low or unstable.
Swap injector 8 with another cylinder’s injector (if identical) and repeat learning or see if the fault follows the injector. If it follows, replace the injector.
If problem follows harness area instead of injector, perform wiring continuity/resistance tests and repair harness/connector or grounds as needed.
If wiring and injector test good, check PCM for driver faults or software updates; reprogram PCM if required by manufacturer service bulletin.
If electrical and fuel systems OK, perform mechanical tests (compression, leak-down) to rule out engine issues affecting effective injector flow.
After repairs, clear DTCs, perform required injector offset/calibration relearn procedure per service manual, and road test to verify code does not return.

Likely causes

Clogged or partially stuck injector on cylinder 8 (Bank B)
Wiring/connectors to injector 8 have high resistance or intermittent connection
Fuel pressure low or fuel supply issue affecting injector flow
Injector installed with incorrect flow characteristics or not coded

Fault status

⚠️ Status

Cylinder 8 (Bank B) fuel injector adaptation at minimum learning limit — PCM unable to reach required injector offset. Possible injector, wiring, fuel delivery, mechanical, or calibration fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours