P2B9D

Coolant Pump A Supply Voltage Circuit

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–111 (est.)

Symptoms

Engine overheating
Unstable engine operation
Check Engine light comes on
Reduced cooling efficiency

Causes

Open or short circuit in the power supply
Coolant pump malfunction
Relay or fuse problems
Wiring harness damage

How to Fix

Check the coolant pump fuse and relay
Inspect the wiring harness and connectors for damage.
Check the voltage at the coolant pump
Replace the coolant pump if necessary

Related codes