P0CA014 Volt Power Module Current Sensor B Circuit Intermittent
- 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
- P0CA0 covers short dropouts or spikes in the signal of current sensor B, the output-side sensor of the 14 V power module (DC/DC converter) in GM's numbering. Between the events the reading looks normal, which separates it from the hard low and high faults P0C9E and P0C9F. No manufacturer documents P0CA0 publicly; GM's eAssist table only lists fixed limits for this sensor, below 2 A and above 123 A, each judged over 1.5 s in 2 s, and the cross-check P0CC5. CARB paragraph (e)(15.3.1) still expects such inputs to be monitored without pause. Vibration, a loose module connector, corroded grounds or poor 12 V cable connections are the first things to inspect; freeze-frame data helps to catch the moment.
- What you may notice
- Warning lamp that comes and goes
- Occasional dim lights or voltage messages
- Likely causes
- LikelyLoose or fretting connector at the power module
- PossibleCorroded ground or 12 V output connection
- RareCurrent sensor B failing intermittently inside the module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.