U066D

Lost Communication With Charge Air Cooler Temperature Sensor Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Possible problems with turbocharging
The car may go into emergency mode

Causes

Open or short circuit in the sensor circuit
Charge air cooler 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 (resistance, voltage)
Inspect the sensor connector and contacts for oxidation or damage.
Check the functionality of the temperature sensor
Replace sensor if necessary
Check the condition of the wiring harness between the sensor and the ECU

Related codes

U066E U0100 U0121