P046C

EGR Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine idling
Increased fuel consumption
Power Loss
Check Engine light comes on

Causes

Faulty EGR sensor
Open or short circuit in wiring harness
Dirty or clogged EGR system
EGR solenoid problems
Engine control unit (ECU) malfunction

How to Fix

Check the resistance and output of the EGR sensor
Inspect the wiring harness for damage
Clean or replace EGR system components
Check the operation of the EGR solenoid
If necessary, replace the mosunode element

Related codes

P0401 P0402 P0403 P0404