P061CInternal Control Module Engine RPM Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Electronic throttle systems run a second, independent calculation on the same processor (level 2, at Ford 'IPC – independent plausibility check') that recomputes driver demand, permitted and actual torque and their inputs, and compares them with the main software. P061C means the two internal engine speed calculations from the crankshaft signal disagree. GM's 6.6 L Duramax sets it at 400 rpm or more difference once the redundant speed is at least 600 rpm and the engine is synchronised, after 0.32 s, with the lamp after two trips; Ford's diesel also uses 400 rpm (5 s), Ford petrol engines react within 1 s with the check engine light. Because speed is a base value of torque monitoring, limp mode follows. A disturbed crankshaft signal can make both paths react differently, so fix P0335–P0339 first.
- What you may notice
- Check engine, wrench or service lamp
- Reduced power or RPM limit
- Stumbling or brief misfires with a disturbed signal
- Rarely stalling
- Likely causes
- LikelyEngine module software or calibration fault (update available)
- PossibleDisturbed crankshaft signal (sensor, reluctor, shielding, connector, interference)
- PossibleVoltage dips, poor ground or supply at the module
- RareInternal defect of the engine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.