P040C

EGR Temperature Sensor A Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Rough engine operation
Power reduction
Increased fuel consumption
Unstable idle

Causes

EGR temperature sensor malfunction
Open or short circuit in wiring harness
Poor contact in the sensor connector
Problems with the ECU

How to Fix

Check the condition of the EGR temperature sensor wiring harness
Check the sensor resistance (compare with the manufacturer's standard)
Inspect the sensor connector contacts for corrosion.
If necessary, replace the EGR temperature sensor

Related codes

P0401 P0402 P0403 P0404