P0A8914 Volt Power Module Current Sensor A Circuit High
- 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
- P0A89 is set when the current sensor of the 14 V power module reports more current than the converter can physically carry. GM's eAssist tables show how: in 2013 the APM input current reading had to exceed 22.5 A for 1.5 s while calculated output power was 1.5 kW or less; in 2016 the limit is 45.25 A or more in 200 of 250 samples (about 5 s) with the APM commanded on and 9 to 32 V supply. Both versions classify it Type B, so the MIL lights after the second failing trip. Typical causes are a signal short to voltage or an internal sensor fault. P0A88 is the low counterpart, P0A87 the in-range plausibility test, and the APM output sensor has its own codes (P0C9E/P0C9F).
- What you may notice
- MIL and hybrid/charging warning
- Converter output limited, 12 V voltage drops
- Start/stop function may be disabled
- Likely causes
- LikelySensor signal shorted to supply voltage
- PossibleCurrent sensor in the power module failed
- RareOpen sensor ground pulling the signal high
- 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.