U0670
Lost Communication With Fuel Temperature Sensor A
U0670 is an OBD-II diagnostic trouble code meaning: Lost Communication With Fuel Temperature Sensor A. Common causes: open or short circuit in the sensor circuit, fuel temperature sensor malfunction. Estimated repair cost: $17–56.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Reduced engine power
- Unstable engine operation at idle
- Problems starting the engine in cold weather
Causes
- Open or short circuit in the sensor circuit
- Fuel temperature sensor malfunction
- Poor contact in the sensor connector
- Wiring harness damage
- Engine ECU malfunction
How to Fix
- Check the continuity of the fuel temperature sensor circuit
- Check the sensor connector for corrosion or damage.
- Replace the fuel temperature sensor if necessary
- Check and replace wiring harness if necessary
- Diagnose the engine ECU
Related codes
Error U0670 by Vehicle Brand
FAQ
What does the U0670 code mean?
U0670 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Fuel Temperature Sensor A
What causes a U0670 error code?
The most common causes of U0670 include: Open or short circuit in the sensor circuit; Fuel temperature sensor malfunction; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U0670 diagnostic trouble code?
To fix U0670: Check the continuity of the fuel temperature sensor circuit. Check the sensor connector for corrosion or damage.. Replace the fuel temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0670?
Yes, but get it checked soon
How much does it cost to fix U0670?
The estimated repair cost for U0670 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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