Powertrain, generic · Hybrid propulsion

P0DFF Battery Charger Coolant Control Valve Control Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0DFF is the short-to-voltage case for the valve that cools the on-board charger. The controller sees the drive line high while commanding it low. No manufacturer documents P0DFF publicly. The closest published logic is GM's 2011 Volt monitor for battery coolant valve A (P0CE3). It watches for a high sense level on drive 1 while the valve is stopped or moving forward, above 9 V system voltage, and stores a two-trip Type B code only after 90 bad results in 100 samples taken at 6.25 ms intervals. If the wire is stuck at battery potential the actuator stays powered, and the valve can travel to its end position rather than stopping where it was. If that leaves the charger uncooled, charging power drops. Usual causes are chafed insulation touching a powered conductor or an output stage that fails to turn off. Ground short is P0DFE.

Likely causes

Control wire shorted to a supply voltage
Output stage in the controlling module will not switch off
Internal fault in the valve actuator

Symptoms

  • Charging slower or charger warning
  • Valve audibly running to its end stop
  • 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

P0DFEP0DFDP0CE3P0D1EP0DEC

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