P00B6
Radiator Coolant Temperature/Engine Coolant Temperature Correlation
Difference between radiator outlet and engine coolant temperatures is implausible — typically indicates a stuck thermostat.
Difference between radiator outlet and engine coolant temperatures is implausible — typically indicates a stuck thermostat.
Common causes
- high
Thermostat stuck open (slow warm-up)
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-440
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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 P00B6 mean?
P00B6 means "Radiator Coolant Temperature/Engine Coolant Temperature Correlation". It is a generic OBD-II code that points to a fault in the fuel & air metering / auxiliary emission controls.
What are the most common causes of P00B6?
thermostat stuck open (slow warm-up) — 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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