U05A3

Invalid Data Received From Reductant Quality Module

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Possible engine power limitation
Increased consumption of AdBlue reagent
Unusual reagent level or quality readings
Problems starting the SCR system

Causes

Reagent quality module malfunction
Problems with the urea concentration sensor
Open or short circuit in wiring
Poor quality or unsuitable AdBlue reagent
Software error in control module

How to Fix

Check the quality and level of AdBlue reagent
Diagnose the reagent quality module
Check the integrity of wiring and connectors
Scan the system for other errors
Update module software if necessary
Repair only from an authorized dealer

Related codes

U05A0 U05A1 U05A2