U040C

Invalid Data Received From Exhaust Gas Recirculation Control Module B

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Deterioration in acceleration dynamics
Increased fuel consumption
Unstable engine operation at idle
Possible misfires

Causes

EGR module B malfunction
Open or short circuit in the communication circuit
Poor contact in connectors
Software error in EGR module B
EGR module B power supply problems

How to Fix

Check the integrity of the wiring harness to the EGR module B
Check connections and contacts in connectors
Scan EGR module B for errors
If necessary, replace EGR module B
Update module software (if available)

Related codes

U040B U040D U040E