P2E27Drive Motor A Phase X-Y-Z Current Sensor Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E27 compares the three current sensors of phases X, Y and Z of drive motor A with each other. Mitsubishi Electric's patent joins the X, Y and Z windings in a star, so their currents must add up to almost zero at every instant; a clear residual means at least one sensor is wrong, even if every reading passes its own checks. No manufacturer documents P2E27 publicly. GM's U-V-W counterpart P0BFD shows the limits: an absolute sum of 110 A for 0.02 s on the 2016 Volt or for 0.0032 s within 0.0038 s in a 2019 table, and above 156 A on the 2016 Cadillac ELR, all Type A. GM's eAssist skips its balance check while a single sensor code is set, because that code already names the culprit; the correlation alone cannot. Single faults: P2E1B to P2E26.
- What you may notice
- Hybrid warning lamp and MIL
- Electric drive limited or temporarily switched off
- No single sensor code stored alongside
- Likely causes
- LikelyOne of the three X/Y/Z sensors drifted in offset or gain
- PossibleDisturbed common reference of the current sensors
- RareLeakage current from the X/Y/Z winding group to the housing
- RareMotor control software calibration
- 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: €200 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.