P0D5BBattery Charger 14 Volt Output Power Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- P0D5B checks whether the power leaving the charger's built-in 14 V output is physically possible. GM's charger module for the Volt and ELR multiplies the measured 14 V output voltage and current and compares the product with the AC input power times a factor of about 2 plus an offset: 2.5 W in the 2011 table, 125 W in the 2014 Volt/ELR and 2016 ELR tables. Exceeding that for 1.6 s within a 2 s window sets a Type A fault with MIL. The test only runs when the sensor codes P0D44, P0D45, P0D49 and P0D4A are clear, and the same low-voltage power also enters GM's total output check P1ECE. Because the 12 V side only takes part while charging, failures mostly show up as charging faults.
- What you may notice
- MIL on (GM)
- Charging interrupted
- 12 V battery not supported while plugged in
- Likely causes
- LikelyVoltage or current measurement of the 14 V stage reads too high
- PossibleAC input power measured too low
- PossibleLow-voltage stage of the on-board charger faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.