U3504 — Control Module Input Power B Circuit Range/Performance

What Does U3504 Mean?

U3504 is a diagnostic trouble code indicating: Control Module Input Power B Circuit Range/Performance. 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 U3504

⚠️ Check Engine Light (MIL) illuminated
⚠️ Control Module Input Power B not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ System warning light illuminated

Common Causes

🔍 Control Module Input Power B degraded or contaminated
🔍 Mechanical wear or binding in Control Module Input Power B
🔍 Incorrect Control Module Input Power B installed (wrong part number)
🔍 Related system mechanical issue affecting Control Module Input Power B readings

Frequently Asked Questions

What does U3504 mean?

U3504 indicates: Control Module Input Power B Circuit Range/Performance. The vehicle's computer has detected that the Control Module Input Power B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code U3504?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U3504 for extended periods may cause additional problems.

How much does it cost to fix U3504?

Repair costs for U3504 typically range from $50 to $250, 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 and clean Control Module Input Power B
🔧 Replace degraded Control Module Input Power B
🔧 Check for related mechanical issues affecting readings

1
Find your vehicle above
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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.

U3504: Control Module Input Power B Circuit Range/Performance