P046D

EGR Sensor A Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Check Engine light comes on

Causes

Broken or damaged wiring harness
Poor contact in connectors
EGR sensor malfunction
Problems with the engine control unit

How to Fix

Check the integrity of the EGR sensor wiring harness and connectors
Clean connector contacts from oxides and corrosion
Check the resistance and voltage of the EGR sensor
Replace EGR sensor if necessary
Scan the control unit for other errors

Related codes

P0401 P0402 P0403 P0404