P1638 — Throttle Valve Position Control Throttle Stuck Temporarily

What Does P1638 Mean?

P1638 is a manufacturer-specific diagnostic trouble code: Throttle Valve Position Control Throttle Stuck Temporarily. This code applies to BMW, VOLKSWAGEN, OTHER, JAGUAR, BUICK 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 P1638

⚠️ Check Engine Light (MIL) illuminated
⚠️ Throttle Valve Position Control Throttle Stuck Temporarily not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Faulty Throttle Valve Position Control Throttle Stuck Temporarily
🔍 Wiring or connector issue in Throttle Valve Position Control Throttle Stuck Temporarily circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P1638 mean?

P1638 indicates: Throttle Valve Position Control Throttle Stuck Temporarily. The vehicle's computer has detected that the Throttle Valve Position Control Throttle Stuck Temporarily is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1638?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1638 for extended periods may cause additional problems.

How much does it cost to fix P1638?

Repair costs for P1638 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 Throttle Valve Position Control Throttle Stuck Temporarily and related wiring
🔧 Replace faulty Throttle Valve Position Control Throttle Stuck Temporarily

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.

P1638: Throttle Valve Position Control Throttle Stuck Temporarily