P040D

EGR Temperature Sensor A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Unstable idle

Causes

EGR temperature sensor malfunction
Open or short circuit in the sensor wiring harness
Poor contact in the sensor connector
Engine control unit (ECU) malfunction

How to Fix

Check the connection of the EGR temperature sensor
Inspect the wiring harness for damage
Measure sensor resistance
Check the sensor signal using a scanner
If necessary, replace the sensor or repair the wiring harness

Related codes

P0401 P0402 P0403 P0404