P0D1A

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

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–94 (est.)

Symptoms

Hybrid system power reduction
Fault message on the dashboard
Battery pack overheating
Increased noise from cooling fans
Automatic transition to emergency mode

Causes

Open circuit in valve control circuit
Short circuit to ground or power
Malfunction of the cooling valve itself
Wiring harness damage
Problems with the hybrid system control unit

How to Fix

Check valve circuit fuse
Diagnose valve resistance (must meet specifications)
Inspect wiring and connectors for damage
Check the reference voltage and control signals from the ECU
If necessary, replace the faulty cooling valve

Related codes

P0D19 P0D1B P0A92