P0488

EGR Throttle Control Circuit A Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable idle
Reduced engine power
Check Engine Light Illuminates
Increased emissions of harmful substances

Causes

Open or short circuit in wiring harness
Malfunction of the electromagnetic valve (solenoid) EGR
Mechanical sticking of the EGR throttle valve
Contamination or carbon deposits on the EGR valve
EGR damper position sensor malfunction
Software error in the ECU

How to Fix

Check wiring harness and connectors for damage
Check EGR solenoid resistance and power supply
Clean or replace EGR throttle body
Check EGR flap position sensor
Update ECU firmware
Replace EGR control unit if necessary

Related codes

P0401 P0402 P0403 P0404