Powertrain, generic · Hybrid propulsion

P0DFE Battery Charger Coolant Control Valve Control Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0DFE means the control line of the charger coolant valve reads low, usually because it is shorted to ground somewhere between driver and valve. No manufacturer documents P0DFE publicly. GM's 2011 Volt tables show how such a check works on battery coolant valve A (P0CE2): with system voltage above 9 V and the valve commanded in reverse, a low sense level on drive 1 counts as a failure, and the code needs a fault in 90 of 100 checks spaced 6.25 ms apart before it is set as a two-trip Type B code. For the charger valve a similar logic is likely but not published. A ground short typically freezes the valve where it is, so the charger may be left without coolant and lower its power. Look for chafed wires and wet connectors. Open circuit is P0DFD.

Likely causes

Control wire chafed through and shorted to ground
Coolant or water in the valve connector
Internal short in the valve actuator

Symptoms

  • Reduced charging power, longer charging time
  • Charger warning or charging stops
  • Driving normally unaffected

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–600
Time0.5–2.5 h

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

Parts involved

battery charger coolant valvewiring harnesson board charger

Related codes

P0DFDP0DFFP0CE2P0D1DP0DEB

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