Powertrain, generic · Hybrid propulsion

P0D1D Hybrid/EV Battery Pack Coolant Control Valve B Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0D1D reports that the drive line of coolant control valve B reads too low, which normally means a short to ground. No manufacturer publishes P0D1D itself. The closest documented test is GM's check of valve A in the 2011 Chevrolet Volt and the 2016 Cadillac ELR: the motor-driven valve has two driver lines, and a low reading on line 1 while the valve should run in reverse, with system voltage above 9 V or 10.2 V, sets the code after 90 failed samples out of 100; it is Type B, which lights the MIL only on the second trip. A comparable logic is to be expected for B. Typical findings are a wire chafed through to the body, water in a connector or an internal short in the valve motor. While active, the valve stays where it is. Short to voltage is P0D1E, open circuit P0D1A.

Likely causes

Valve B driver wire chafed and shorted to ground
Moisture or corrosion in the valve connector
Internal short in the valve motor

Symptoms

  • MIL after two trips (where the maker uses a two-trip code)
  • Battery cooling or heating restricted, charging or power limited

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–600
Time0.5–3 h

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

Parts involved

hv battery pack coolant valve bwiring harnessbms

Related codes

P0D1EP0D1AP0CE2P0DEB

References: gsi.ext.gm.com, gsi.ext.gm.com, law.cornell.edu.