P1544 — Throttle Actuation Potentiometer Signal Too High

What Does P1544 Mean?

P1544 is a manufacturer-specific diagnostic trouble code: Throttle Actuation Potentiometer Signal Too High. This code applies to VOLKSWAGEN, BUICK, CADILLAC, CHEVY, CHRYSLER 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 P1544

⚠️ Check Engine Light (MIL) illuminated
⚠️ Abnormal signal from Throttle Actuation Potentiometer
⚠️ Related system may operate erratically
⚠️ Reduced engine performance

Common Causes

🔍 Throttle Actuation Potentiometer producing abnormal signal
🔍 Electromagnetic interference affecting Throttle Actuation Potentiometer signal
🔍 Wiring issue distorting Throttle Actuation Potentiometer signal

Frequently Asked Questions

What does P1544 mean?

P1544 indicates: Throttle Actuation Potentiometer Signal Too High. The vehicle's computer has detected that the Throttle Actuation Potentiometer is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1544?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1544 for extended periods may cause additional problems.

How much does it cost to fix P1544?

Repair costs for P1544 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 Actuation Potentiometer and related wiring
🔧 Replace faulty Throttle Actuation Potentiometer

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.

P1544: Throttle Actuation Potentiometer Signal Too High