P0C53Drive Motor A Position Sensor Circuit A High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C53 is the high counterpart of P0C52: the reference level on the S1/S3 winding circuit of the motor A resolver rises above its window, typical of a short to a voltage source or an open line that floats up. GM uses an upper limit of 4.5 V on the 2011 Volt, 2013 eAssist and 2016 Volt and ELR, 4.9 V on the 2019 Volt and only 3.0 V on the 2012 two-mode Tahoe, Yukon, Escalade, Sierra and Silverado hybrids. It reacts faster than on the low side: 20 of 30 samples (about 208 ms) on the 2011 Volt, 0.2125 s within 0.3125 s on the 2016 Volt. MIL logic is Type A on the 2011 Volt and the 2012 trucks, Type B on eAssist and the later Volt. No bulletin names this code for motor A.
- What you may notice
- Check engine lamp with hybrid system message
- Reduced propulsion or electric drive unavailable
- Rough engine running on vehicles that use motor A for starting
- Likely causes
- LikelyOpen S1 or S3 line or a terminal that has backed out, letting the input drift high
- PossibleCircuit A line shorted to a voltage-carrying wire in the harness
- PossibleBroken S1/S3 winding in 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.