P1126 — Throttle Position (Narrow Range) Sensor Circuit Malfunction

What Does P1126 Mean?

P1126 is a manufacturer-specific diagnostic trouble code: Throttle Position (Narrow Range) Sensor Circuit Malfunction. This code applies to OTHER, VOLKSWAGEN, MAZDA, LEXUS, TOYOTA 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 P1126

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Throttle Position (Narrow Range) Sensor readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Throttle Position (Narrow Range) Sensor circuit (damaged, chafed, or corroded)
🔍 Faulty Throttle Position (Narrow Range) Sensor connector or terminal
🔍 Failed Throttle Position (Narrow Range) Sensor
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1126 mean?

P1126 indicates: Throttle Position (Narrow Range) Sensor Circuit Malfunction. The vehicle's computer has detected that the Throttle Position (Narrow Range) Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1126?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1126 for extended periods may cause additional problems.

How much does it cost to fix P1126?

Repair costs for P1126 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 and repair Throttle Position (Narrow Range) Sensor wiring and connectors
🔧 Replace faulty Throttle Position (Narrow Range) Sensor

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.

P1126: Throttle Position (Narrow Range) Sensor Circuit Malfunction