P0A4CGenerator Position Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0A4C means the generator resolver delivers signals that are electrically present but implausible, so the computed rotor angle cannot be trusted. Mitsubishi documents the exact limits for the 2023 Outlander PHEV: the sine or cosine winding voltage must stay between 2.1 and 2.9 V; if either leaves that window for 0.28 s, or an internal status fault persists for 0.31 s, the generator control unit stores P0A4C. Typical triggers are a corroded or loose resolver plug, a chafed shield picking up noise, a winding that has drifted, or a faulty input stage in the power drive unit. P0A4B is the general circuit fault, P0A4D and P0A4E the hard low and high signal, P0A4F a sporadic dropout. Expect a hybrid warning, reduced power and possibly no engine start via the generator.
- What you may notice
- Hybrid system warning and MIL
- Reduced drive power or engine-only operation
- Engine start via the generator not possible
- Likely causes
- LikelyCorroded or loose resolver connector
- PossibleDamaged shielding letting interference onto the sine/cosine lines
- PossibleResolver winding drifted out of tolerance
- RareFaulty resolver input stage in the power drive unit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.