P26D4

Engine Coolant Pump Supply Voltage Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Engine overheating
Unstable engine operation
Check Engine Light Illuminates
Reduced engine power
Noises from the coolant pump

Causes

Coolant pump malfunction
Damage to wiring or connectors
Faulty relay or fuse
Problems with the ECU
Short circuit in the circuit

How to Fix

Check the voltage at the coolant pump
Inspect wiring and connectors for damage
Check relays and fuses
Replace the coolant pump if necessary
Check the operation of the computer

Related codes

P26D3 P26D5 P26D6