U0669

Lost Communication With EGR Sensor D

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–67 (est.)

Symptoms

Check Engine light comes on
Poor engine performance at idle
Increased fuel consumption
Reduced engine power
Unstable operation during acceleration

Causes

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

How to Fix

Check the continuity of the EGR D sensor circuit
Inspect the connectors and contacts of the sensor
Check sensor resistance
Replace faulty EGR D sensor
Flash or replace the ECU if necessary

Related codes

U0668 U0670 P0400