P0C5CDrive Motor A Position Sensor Circuit B Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C5C tells that the reference level on the S2/S4 winding of the motor A resolver, Circuit B, has fallen below its floor. GM uses 0.5 V on the 2011 Volt, 2012 two-mode trucks, 2013 eAssist and the 2016 Volt and ELR, 0.10 V on the 2019 Volt; the low side needs a longer confirmation than the high side, for example 0.525 s within 0.8375 s on the 2016 Volt. On the single-motor eAssist it is a two-trip Type B code. Bentley lists P0C5C00 first in its Bentayga Hybrid note 2066714: damaged 12 V transmission wiring, often with P0C5200 and a temperature sensor code P0A2D00, so a harness worn through on one spot can pull down both windings and other motor sensors at once.
- What you may notice
- Engine warning light, often with P0C52 and a motor temperature code
- Electric drive limited or switched off
- On mild hybrids loss of start-stop and assist
- Likely causes
- LikelyTransmission harness chafed or pinched, grounding an S2/S4 line (Bentley TPI 2066714)
- PossibleMoisture or corrosion in the resolver connector
- PossibleShorted S2/S4 winding in the resolver stator
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.