U05A3 — Invalid Data Received From Reductant Quality Module

What Does U05A3 Mean?

U05A3 is a diagnostic trouble code indicating: Invalid Data Received From Reductant Quality Module. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U05A3

⚠️ Check Engine Light (MIL) illuminated
⚠️ Invalid Data Received From Reductant Quality Module not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ System warning light illuminated

Common Causes

🔍 Faulty Invalid Data Received From Reductant Quality Module
🔍 Wiring or connector issue in Invalid Data Received From Reductant Quality Module circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does U05A3 mean?

U05A3 indicates: Invalid Data Received From Reductant Quality Module. The vehicle's computer has detected that the Invalid Data Received From Reductant Quality Module is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code U05A3?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U05A3 for extended periods may cause additional problems.

How much does it cost to fix U05A3?

Repair costs for U05A3 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Invalid Data Received From Reductant Quality Module and related wiring
🔧 Replace faulty Invalid Data Received From Reductant Quality Module

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

U05A3: Invalid Data Received From Reductant Quality Module