U0644

Lost Communication With Wastegate Position Sensor A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Check Engine Light Is On
Turbojam during acceleration
Emergency engine operation

Causes

Open or short circuit in the sensor circuit
Turbine position sensor malfunction
Connector problems or contact corrosion
Engine ECU malfunction
Mechanical damage to the wastegate

How to Fix

Check the integrity of the wiring harness to the sensor
Check the voltage and resistance of the sensor
Clean sensor connector contacts
Replace the turbine position sensor if necessary
Carry out ECU diagnostics if the error persists

Related codes

U0645 U0643 P2262