P0CC514 Volt Power Module Current Sensor A/B Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0CC5 compares the two current sensors of the 14 V power module, the DC/DC converter that feeds the 12 V network from the high-voltage battery. In GM's 2013 eAssist table 13OBDG05C, where the unit is the accessory power module (APM), sensor A measures the input and sensor B the output side. The module computes an input power, multiplies it by an efficiency factor taken from a table (0.99 down to 0.90) and compares the result with the power derived from the output side; a gap above 0.4 kW for 3.75 s within a 5 s window, at 9 to 32 V and with the input power inside the enabling window the table ties to 1.25 kW, is a Type B fault. The check is suspended while the single-sensor codes P0A88/P0A89 or P0C9E/P0C9F are active. One drifting sensor is the usual reason, and a 12 V battery that stays poorly charged is a typical sign.
- What you may notice
- Check-engine lamp after the second faulty trip
- 12 V battery not fully charged or low-voltage warning
- Likely causes
- LikelyOffset or gain drift of one current sensor
- PossibleInternal fault of the power module, e.g. real efficiency loss
- RareCalibration or software fault in the module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.