P0C53 code meaning
Drive Motor A Position Sensor Circuit A High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C53 means
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.
P0C53 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C53
- Check engine lamp with hybrid system message
- Reduced propulsion or electric drive unavailable
- Rough engine running on vehicles that use motor A for starting
Common causes of P0C53
- Most 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
- Less likelyFaulty resolver input in the motor control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor a position sensor aWiring harnessHybrid control module
What each part of P0C53 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 53 | The exact fault in that area. |
What to do next
- Note P0C53 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C53
What does P0C53 mean?
P0C53 means "Drive Motor A Position Sensor Circuit A High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C53?
Drive gently and only to a workshop. With P0C53 the car can go into limp mode (reduced power) to protect itself.
Will P0C53 fail an emissions test?
Yes, it can. P0C53 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C53 to fix?
Difficulty: hard. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0C53 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.