U0670

Lost Communication With Fuel Temperature Sensor A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

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

U0671 U0672 U0673