P01E9

Engine Coolant Heater A Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Poor engine starting in cold weather
Extended engine warm-up time
Check Engine Light Illuminates

Causes

Open or short circuit in wiring harness
Coolant heater malfunction
Problems with the engine control unit (ECU)
Poor contact in connectors

How to Fix

Check the wiring harness for breaks or damage
Check the resistance of the coolant heater
Check connectors for corrosion or poor contact
If necessary, replace the heater or wiring harness

Related codes

P01EA P01EB P0125