P0C58: 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. 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.

Symptoms

• Check engine lamp, frequently together with P0C62
• Reduced propulsion power
• Fault may only be in history memory

Most likely causes

• Faulty motor B position sensor on 2011-13 Volt and 2014-16 ELR (GM PIC5856)
• Open S1 or S3 line or spread terminal at the resolver connector
• Motor control module running an older calibration

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0C58 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• C: Subsystem depends on the code range
• 58: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0C58?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0C58?

The most common causes are: faulty motor B position sensor on 2011-13 Volt and 2014-16 ELR (GM PIC5856); open S1 or S3 line or spread terminal at the resolver connector; motor control module running an older calibration.

Related codes

• P0C57Drive Motor B Position Sensor Circuit A Low
• P0C62Drive Motor B Position Sensor Circuit B High
• P0C55Drive Motor B Position Sensor Circuit A
• P0C59Drive Motor B Position Sensor Circuit A Intermittent/Erratic
• P0A48Drive Motor B Position Sensor Circuit High

Sources

• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
• gsi.ext.gm.com: 12OBDG06 Hybrid Diagnostics
• gsi.ext.gm.com: 19OBDG01 Hybrid Diagnostics
• static.nhtsa.gov: MC 10113076 9999

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.