P01F8
Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High
P01F8 is an OBD-II diagnostic trouble code meaning: Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High. Common causes: short circuit in the heater circuit, control driver failure. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light
- Reduced preheating efficiency
- Problems starting in cold weather
- Heater overheating
Causes
- Short circuit in the heater circuit
- Control driver failure
- Heater overheating
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Diagnostics of the heater control circuit
- Checking the resistance and insulation of the heater
- Inspect the wiring harness for damage
- Checking power and ground circuit
- Testing the control driver
- Replacing faulty components
- Resetting the error and checking the system operation
Related codes
Error P01F8 by Vehicle Brand
FAQ
What does the P01F8 code mean?
P01F8 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High
What causes a P01F8 error code?
The most common causes of P01F8 include: Short circuit in the heater circuit; Control driver failure; Heater overheating; Wiring Harness Problems.
How do I fix a P01F8 diagnostic trouble code?
To fix P01F8: Diagnostics of the heater control circuit. Checking the resistance and insulation of the heater. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P01F8?
Limited driving only, diagnose soon
How much does it cost to fix P01F8?
The estimated repair cost for P01F8 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat