P26D1

Engine Coolant Pump Control Module System Voltage High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Engine overheating
Unstable engine operation
Reduced engine performance
Coolant pump noise

Causes

Coolant pump control module malfunction
Problems with the charging system (alternator, voltage regulator)
Short circuit in pump control circuit
Wiring harness damage
Battery problems

How to Fix

Check the voltage in the charging system
Diagnose the coolant pump control module
Check the integrity of the pump control circuit
Inspect the wiring harness for damage
If necessary, replace the pump control module

Related codes

P26D0 P26D2 P26D3