P0DE8

Hybrid/EV Battery Pack Coolant Control Valve C Control Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Battery overheating
Reduced vehicle power
Increased fuel consumption (for hybrids)

Causes

Broken wiring to the cooling valve
Malfunction of the cooling valve itself
Problems with the relay or circuit fuse
Short circuit in wiring harness
Malfunction of the hybrid system control ECU

How to Fix

Check control circuit fuses and relays
Check the integrity of the wiring to the valve
Check cooling valve resistance
Replace faulty valve if necessary
Check the operation of the system after repair

Related codes

P0DE7 P0DE9 P0A7F