U066A

Lost Communication With EGR Sensor E

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Unstable engine idling
Increased fuel consumption
Reduced engine power
Dips during acceleration

Causes

Open or short circuit in the EGR sensor circuit
Malfunction of the EGR sensor itself
Problems with the sensor connector
ECU malfunction
Contact corrosion

How to Fix

Check the integrity of the sensor wires and connectors
Check the power supply and ground of the sensor
Check EGR sensor resistance
Replace EGR sensor if necessary
Check and, if necessary, replace the computer

Related codes

U0668 U0669 P0401