P01F8
Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High
Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High: the component is overheating, typically from extended load or slip.
Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High: the component is overheating, typically from extended load or slip.
Common causes
- high
Short circuit in heater wiring or element
One of the most commonly reported causes for this code — check this first.
Typical part cost: $110-770
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P01F8 mean?
P01F8 means "Engine Coolant Heater A Control Circuit Driver Current/Temperature Too High". It is a generic OBD-II code that points to a fault in the fuel & air metering.
What are the most common causes of P01F8?
short circuit in heater wiring or element — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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