P1771 — Throttle Position Sensor Circuit Open To Transmission Control Module

What Does P1771 Mean?

P1771 is a manufacturer-specific diagnostic trouble code: Throttle Position Sensor Circuit Open To Transmission Control Module. This code applies to 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 P1771

⚠️ Check Engine Light (MIL) illuminated
⚠️ No signal from Throttle Position Sensor
⚠️ Related system defaulting to backup values
⚠️ Reduced engine performance

Common Causes

🔍 Broken wire in Throttle Position Sensor circuit
🔍 Disconnected Throttle Position Sensor electrical connector
🔍 Throttle Position Sensor internal open circuit failure
🔍 Corroded terminal pins preventing electrical contact

Frequently Asked Questions

What does P1771 mean?

P1771 indicates: Throttle Position Sensor Circuit Open To Transmission Control Module. The vehicle's computer has detected that the Throttle Position Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1771?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1771 for extended periods may cause additional problems.

How much does it cost to fix P1771?

Repair costs for P1771 typically range from $30 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

🔧 Locate and repair broken wire in Throttle Position Sensor circuit
🔧 Replace damaged Throttle Position Sensor connector
🔧 Replace Throttle Position Sensor if internally open

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.

P1771: Throttle Position Sensor Circuit Open To Transmission Control Module