P0C9E14 Volt Power Module Current Sensor B Circuit Low
- 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
- P0C9E is set when current sensor B of the 14 V power module reads too little. GM documents it for the eAssist accessory power module in its 2013 table 13OBDG05C: the APM output current measured by the sensor must stay below 2 A for 1.5 s, counted as 60 of 80 samples at 25 ms, with the vehicle in run/crank; the code is Type B, so the MIL comes on after the second failing trip. Since an operating converter feeds considerably more current to the 12 V side, such a reading points to an open signal path, a grounded signal line or a dead sensor. The input-side counterpart is P0A88, the high fault P0C9F. Without valid current data the system may restrict the converter, and the 12 V battery can run down.
- What you may notice
- Check-engine lamp after two drives
- Low 12 V voltage, flickering lights or warning messages
- Likely causes
- LikelyOutput current sensor B failed inside the module
- PossibleSensor signal open or shorted to ground
- RareConverter not delivering output although enabled
- 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 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.