P0DFE: Battery Charger Coolant Control Valve Control Circuit Low

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.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

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

Most likely causes

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

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
With the connector unplugged, check whether the signal wire is making contact with ground.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: medium

What each character of P0DFE means

P: Powertrain: engine and transmission
0: Generic code: same on every make
D: Subsystem depends on the code range
FE: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0DFE?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0DFE?

The most common causes are: control wire chafed through and shorted to ground; coolant or water in the valve connector; internal short in the valve actuator.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.