U040B

Invalid Data Received From Exhaust Gas Recirculation Control Module A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Rough engine idling
Increased fuel consumption
Dips during acceleration

Causes

Open or short circuit in the EGR control circuit
EGR control module malfunction
Connector problems or contact corrosion
Software error in EGR module
Mechanical failure of the EGR valve

How to Fix

Check the integrity of the wiring harness to the EGR module
Inspect and clean the connector contacts
Check power and ground of EGR module
Scan the EGR module for errors
Replace EGR control module if necessary

Related codes

U040A U0409 U040C