P0C52Drive Motor A Position Sensor Circuit A 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
- P0C52 reports that the DC reference level on Circuit A of the motor A resolver, the S1/S3 winding in GM terms, has dropped too low, which points to a short to ground or a line pulled down. GM fails it below 0.5 V on the 2011 Volt, 2012 two-mode trucks, 2013 eAssist and 2016 ELR, and below 0.10 V on the 2019 Volt. Timing ranges from 50 of 80 samples taken every 10.4 ms (one trip, Type A) to 0.525 s within 0.8375 s on the 2016 Volt or 0.25 s within 0.375 s on the 2019 Volt (both Type B). Bentley finds P0C5200, often with P0C5C00, on 2020-22 Bentayga Hybrids with a chafed 12 V transmission harness. Unlike P0A41, which rates the whole signal, this code names one winding.
- What you may notice
- Check engine lamp, often with P0C5C stored at the same time
- Electric drive shut off or power reduced
- On some hybrids the engine runs constantly or the car will not start
- Likely causes
- LikelyChafed or pinched transmission harness shorting a Circuit A line to ground (Bentley TPI 2066714)
- PossibleWater or corrosion in the resolver connector
- PossibleShorted S1/S3 winding inside the resolver stator
- RareFaulty resolver input in the motor control 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.