P1235 — VSV 1/2/3 Circuit Range Performance

What Does P1235 Mean?

P1235 is a manufacturer-specific diagnostic trouble code: VSV 1/2/3 Circuit Range Performance. This code applies to JAGUAR, FORD, LINCOLN, MERCURY, 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 P1235

⚠️ Check Engine Light (MIL) illuminated
⚠️ VSV 1/2/3 not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 VSV 1/2/3 degraded or contaminated
🔍 Mechanical wear or binding in VSV 1/2/3
🔍 Incorrect VSV 1/2/3 installed (wrong part number)
🔍 Related system mechanical issue affecting VSV 1/2/3 readings

Frequently Asked Questions

What does P1235 mean?

P1235 indicates: VSV 1/2/3 Circuit Range Performance. The vehicle's computer has detected that the VSV 1/2/3 is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1235?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1235 for extended periods may cause additional problems.

How much does it cost to fix P1235?

Repair costs for P1235 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 VSV 1/2/3
🔧 Replace degraded VSV 1/2/3
🔧 Check for related mechanical issues affecting readings

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.

P1235: VSV 1/2/3 Circuit Range Performance