U0671
Lost Communication With Fuel Temperature Sensor B
U0671 is an OBD-II diagnostic trouble code meaning: Lost Communication With Fuel Temperature Sensor B. Common causes: open or short circuit in the sensor circuit, fuel temperature sensor b malfunction. Estimated repair cost: $17–56.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Deterioration in acceleration dynamics
- Unstable idle speed
- Possible difficulty starting in cold weather
Causes
- Open or short circuit in the sensor circuit
- Fuel temperature sensor B malfunction
- Poor contact in the sensor connector
- Wiring harness damage
- ECU malfunction (rare)
How to Fix
- Check the integrity of the wiring to the sensor
- Check sensor resistance (compare with specifications)
- Inspect connectors for corrosion or damage
- If necessary, replace fuel temperature sensor B
- Reset the error and check for its reappearance
Related codes
Error U0671 by Vehicle Brand
FAQ
What does the U0671 code mean?
U0671 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Fuel Temperature Sensor B
What causes a U0671 error code?
The most common causes of U0671 include: Open or short circuit in the sensor circuit; Fuel temperature sensor B malfunction; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U0671 diagnostic trouble code?
To fix U0671: Check the integrity of the wiring to the sensor. Check sensor resistance (compare with specifications). Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0671?
Yes, but get it checked soon
How much does it cost to fix U0671?
The estimated repair cost for U0671 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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