P01EA

Engine Coolant Heater A Control Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Poor engine starting in cold weather
Unstable operation at idle
Extended engine warm-up time
Check Engine Light Illuminates

Causes

Coolant heating element malfunction
Open or short circuit in control circuit
Wiring harness damage
Faulty relay or fuse
Problems with the engine control unit (ECU)

How to Fix

Check the integrity of the heater control circuit
Check the functionality of the heating element
Check relays and fuses
Inspect the wiring harness for damage
If necessary, replace faulty components
Reset the error and check the system operation

Related codes

P01EB P01EC P01ED