P0C58 code meaning
Drive Motor B Position Sensor Circuit A High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C58 means
P0C58 sets when the S1/S3 winding circuit of the motor B resolver shows a reference level above its window, as from an open lead drifting up or a short to voltage. GM limits are 4.5 V on the 2011 and 2016 Volt, 4.9 V on the 2019 Volt and 3.0 V on the 2012 two-mode trucks, with the fast high-side timing of 20 out of 30 samples on early cars. This is one of the most frequent resolver codes on the first-generation Volt. GM's first note PIC5856 from 2013 already paired P0C58 with P0C62, the S2/S4 high code, on 2011-13 Volts: if wiring is fine, a new motor B position sensor goes in, a part ordered through GM's technical assistance center, and update the module calibration.
P0C58 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C58
- Check engine lamp, frequently together with P0C62
- Reduced propulsion power
- Fault may only be in history memory
Common causes of P0C58
- Most likelyFaulty motor B position sensor on 2011-13 Volt and 2014-16 ELR (GM PIC5856)
- PossibleOpen S1 or S3 line or spread terminal at the resolver connector
- Less likelyMotor control module running an older calibration
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor b position sensor aWiring harnessHybrid control module
What each part of P0C58 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. |
| 58 | The exact fault in that area. |
What to do next
- Note P0C58 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 P0C58
What does P0C58 mean?
P0C58 means "Drive Motor B Position Sensor Circuit A High". P0C58 sets when the S1/S3 winding circuit of the motor B resolver shows a reference level above its window, as from an open lead drifting up or a short to voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C58?
Drive gently and only to a workshop. With P0C58 the car can go into limp mode (reduced power) to protect itself.
Will P0C58 fail an emissions test?
Yes, it can. P0C58 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 P0C58 to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0C58 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.