P01EC
Engine Coolant Heater B Control Circuit/Open
P01EC is an OBD-II diagnostic trouble code meaning: Engine Coolant Heater B Control Circuit/Open. Common causes: broken or damaged wiring harness, coolant heater malfunction. Estimated repair cost: $56–167.
Symptoms
- Long engine warm-up in cold weather
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light on Dashboard
Causes
- Broken or damaged wiring harness
- Coolant heater malfunction
- Relay or fuse problems
- Short circuit in the circuit
- Engine control unit malfunction
How to Fix
- Check heater circuit fuse and relay
- Inspect the wiring harness for damage
- Check heater resistance
- Check the voltage at the heater terminals
- If necessary, replace the heater or repair the wiring
- Reset the error and check if it returns
Related codes
Error P01EC by Vehicle Brand
FAQ
What does the P01EC code mean?
P01EC is an OBD-II diagnostic trouble code that indicates: Engine Coolant Heater B Control Circuit/Open
What causes a P01EC error code?
The most common causes of P01EC include: Broken or damaged wiring harness; Coolant heater malfunction; Relay or fuse problems; Short circuit in the circuit.
How do I fix a P01EC diagnostic trouble code?
To fix P01EC: Check heater circuit fuse and relay. Inspect the wiring harness for damage. Check heater resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P01EC?
Limited driving only, diagnose soon
How much does it cost to fix P01EC?
The estimated repair cost for P01EC is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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