U0689

Lost Communication With Turbocharger/Supercharger B Temperature Sensor

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Possible reduction in engine power
Disabling the turbocharging system
Unstable engine operation
Turbocharger overheating

Causes

Open or short circuit in the sensor circuit
Turbocharger temperature sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Engine ECU malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect the sensor connector for corrosion or damage.
Check the resistance of the temperature sensor
Replace the turbocharger temperature sensor if necessary
Diagnose the engine ECU if the error persists

Related codes

U0688 U0690 U0691