U2021 — Invalid /fault data received (Non SCP)

What Does U2021 Mean?

U2021 is a manufacturer-specific diagnostic trouble code: Invalid /fault data received (Non SCP). This code applies to OTHER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of U2021

⚠️ Check Engine Light (MIL) illuminated
⚠️ Invalid /fault data received (Non SCP) not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ System warning light illuminated

Common Causes

🔍 Faulty Invalid /fault data received (Non SCP)
🔍 Wiring or connector issue in Invalid /fault data received (Non SCP) circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does U2021 mean?

U2021 indicates: Invalid /fault data received (Non SCP). The vehicle's computer has detected that the Invalid /fault data received (Non SCP) is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code U2021?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U2021 for extended periods may cause additional problems.

How much does it cost to fix U2021?

Repair costs for U2021 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 /fault data received (Non SCP) and related wiring
🔧 Replace faulty Invalid /fault data received (Non SCP)

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.

U2021: Invalid /fault data received (Non SCP)