P1651 — Power Steering Pressure Switch Input Fault

What Does P1651 Mean?

P1651 is a manufacturer-specific diagnostic trouble code: Power Steering Pressure Switch Input Fault. This code applies to FORD, LINCOLN, MERCURY, MAZDA, VOLKSWAGEN 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 P1651

⚠️ Check Engine Light (MIL) illuminated
⚠️ Power Steering Pressure Switch Input Fault not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Faulty Power Steering Pressure Switch Input Fault
🔍 Wiring or connector issue in Power Steering Pressure Switch Input Fault circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P1651 mean?

P1651 indicates: Power Steering Pressure Switch Input Fault. The vehicle's computer has detected that the Power Steering Pressure Switch Input Fault is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1651?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1651 for extended periods may cause additional problems.

How much does it cost to fix P1651?

Repair costs for P1651 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 Power Steering Pressure Switch Input Fault and related wiring
🔧 Replace faulty Power Steering Pressure Switch Input Fault

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.

P1651: Power Steering Pressure Switch Input Fault