P01ED

Engine Coolant Heater B Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation at idle
Extended engine warm-up time
Check Engine Light Illuminates

Causes

Open or short circuit in wiring harness
Coolant heater malfunction
Problems with the ECU
Poor contact in connectors

How to Fix

Check the integrity of the wiring harness
Check the resistance of the coolant heater
Inspect connectors for corrosion or damage
If necessary, replace the heater or ECU

Related codes

P01EE P01EF P0128