Powertrain, generic · Hybrid propulsion

P0D5B Battery Charger 14 Volt Output Power Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Voltage or current measurement of the 14 V stage reads too high
AC input power measured too low
Low-voltage stage of the on-board charger faulty

Symptoms

  • MIL on (GM)
  • Charging interrupted
  • 12 V battery not supported while plugged in

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

battery charger 14v outputon board charger

Related codes

P0D5CP0D44P0D45P0D49P0D4AP0D42

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.