U05A6

Invalid Data Received from Reductant Heater Control Module

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
SCR error message on dashboard
Increased NOx emissions

Causes

Open or short circuit in the communication circuit
Malfunction of the reagent heating module
Problems with the wiring harness or connectors
ECU software errors
Contact corrosion in electrical connections

How to Fix

Check the integrity of the wiring harness to the heating module
Check connections and connectors for corrosion
Test the reagent heating module
Update ECU software if necessary
Replace the heating module if a malfunction is detected

Related codes

U05A5 U05A7 U0100