P0CE7: Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit High

P0CE7 is the high-side fault of the battery coolant control valve position feedback. GM sets it when the signal exceeds 95 % of the reference voltage in the 2011 Chevrolet Volt (40 of 50 samples at 100 ms) or 72 % in the 2016 Cadillac ELR (640 of 800 samples at 6.25 ms), in both cases with system voltage above 9 V or 10.2 V and rated Type B, so the MIL lights on the second trip. The ELR value sits just above the highest end stop it accepts while learning (about 69.5 %). An interrupted sensor ground, a signal line shorted to the reference or to battery voltage, or a worn sensor track are typical. The coolant path can then no longer be confirmed, and thermal conditioning may be restricted. The low counterpart is P0CE6.

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

MIL after two trips (GM)
Valve position shown near 100 % in live data

Most likely causes

Sensor ground wire interrupted
Signal wire shorted to reference or battery voltage
Worn sensor track in the 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
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
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: hard
It can trigger limp mode.
It affects emissions.

What each character of P0CE7 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
C: Subsystem depends on the code range
E7: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0CE7?

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 P0CE7?

The most common causes are: sensor ground wire interrupted; signal wire shorted to reference or battery voltage; worn sensor track in the 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.