P04E9

EGR Temperature Sensor D Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Unstable engine operation at idle
Increased fuel consumption
Reduced engine power
Check Engine light comes on

Causes

Open or short circuit in the sensor wiring harness
Oxidation of sensor connector contacts
EGR temperature sensor malfunction
Problems with the ECU

How to Fix

Check the integrity of the sensor wiring harness
Clean sensor connector contacts
Check the resistance of the EGR temperature sensor
Replace sensor if necessary
Reset the error and check the system operation

Related codes

P0401 P0402 P0403