P01E7
Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic
Intermittent signal from ECT sensor 3. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
Intermittent signal from ECT sensor 3. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
Common causes
- high
Connector loose or corroded
One of the most commonly reported causes for this code — check this first.
Typical part cost: $30-220
- low
Connector with intermittent contact under vibration
Less common, but worth ruling out after the more likely causes.
Typical part cost: $30-220
See all causes + fix costs
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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 P01E7 mean?
P01E7 means "Engine Coolant Temperature Sensor 3 Circuit Intermittent/Erratic". It is a generic OBD-II code that points to a fault in the fuel & air metering.
What are the most common causes of P01E7?
connector loose or corroded; connector with intermittent contact under vibration; harness routed against vibrating component — 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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