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Chevrolet Blazer Throttle Position Sensor

42 items

Fix poor throttle response, rough idle, sudden hesitation, or uneven acceleration with a throttle position sensor built to send accurate throttle angle signals to your engine computer.

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Walker Products 200-1294 Throttle Position SensorWalker Products 200-1294 Throttle Position Sensor
Walker ProductsPart # 200-1294
Walker Products 200-1294 Throttle Position Sensor
51 Reviews
$270.99
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3-year warranty
90 days free return
Fits 1984-1984 Chevrolet P30, 1985-1985 Chevrolet C10 Suburban, 1985-1985 Chevrolet K10 Suburban, 1985-1985 Chevrolet K5 Blazer, 1988-1988 Chevrolet R10 Suburban, 1988-1988 Chevrolet V10 Suburban, 1988-1990 Chevrolet C3500, 1988-1990 Chevrolet K3500, 1988-1993 Chevrolet C1500, 1988-1993 Chevrolet K1500, 1989-1989 Chevrolet G20, 1989-1990 Chevrolet R1500 Suburban, 1989-1991 Chevrolet Blazer, 1989-1991 Chevrolet V1500 Suburban, 1989-1992 Chevrolet C2500, 1989-1992 Chevrolet K2500, 1991-1992 Chevrolet G20, 1984-1984 GMC K1500, 1984-1986 GMC C2500, 1984-1986 GMC C3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
200-1294, 141-452, 14074, TPS147, 1TP1197, TH0067, TH150, EC3002, 
...View more
item #1001PTYA
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Walker Products 200-1377 Throttle Position Sensor
Walker ProductsPart # 200-1377
Walker Products 200-1377 Throttle Position Sensor
51 Reviews
$59.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1985-1985 Buick Somerset Regal, 1985-1986 Buick Century, 1985-1986 Buick Skyhawk, 1985-1986 Buick Skyhawk, 1985-1986 Buick Skyhawk, 1985-1986 Buick Skylark, 1986-1986 Buick Skyhawk, 1986-1986 Buick Skyhawk, 1986-1986 Buick Somerset, 1985-1985 Chevrolet Citation II, 1985-1986 Chevrolet Astro, 1985-1986 Chevrolet Camaro, 1985-1986 Chevrolet Celebrity, 1985-1986 Chevrolet S10, 1985-1986 Chevrolet S10 Blazer, 1985-1986 GMC S15, 1985-1986 GMC S15 Jimmy, 1985-1986 GMC Safari, 1985-1986 Oldsmobile Calais, 1985-1986 Oldsmobile Cutlass Ciera
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet Blazer
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
200-1377, 2-1986, 9971, 1TP1305, TH0031, 17078274, 17081077, 17110581, 
...View more
item #1001PYWS
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Page 3 of 3

What is the throttle position sensor? 

The throttle position sensor (TPS) monitors the position of the throttle plate, which controls the airflow into the engine. By providing real-time feedback on how much the driver is pressing the gas pedal, the TPS helps the engine control unit (ECU) adjust the air-fuel mixture for optimal performance and efficiency.

Symptoms of a bad TPS throttle position sensor

A failing or malfunctioning Throttle Position Sensor (TPS) can manifest various symptoms, which may vary in severity. If you notice these situations, they may indicate a potential issue with the TPS:

  • Poor Acceleration: Sluggish or delayed response when pressing the gas pedal.
  • Rough Idle: An unstable or fluctuating engine idle.
  • Stalling: Unexpected engine shutdown, especially at stops.
  • Hesitation During Acceleration: Delayed acceleration after pressing the gas pedal.
  • Surging or Bucking: Jerking or lurching movements during acceleration or at constant speeds.
  • Inconsistent Idle Speed: Fluctuating engine idle speed.
  • Check Engine Light (CEL): Illumination of the Check Engine Light on the dashboard.
  • Poor Fuel Efficiency: Reduced gas mileage and increased fuel consumption.
  • Transmission Shifting Issues: Irregular or harsh shifting in automatic transmissions.
  • Limp Mode: The vehicle's computer may limit power and speed to protect the engine.

How to fix a throttle position sensor?

Fixing a faulty TPS often involves either cleaning the sensor or replacing it, depending on the severity of the problem.

Cleaning the TPS:

  • Disconnect the battery.
  • Locate and remove the TPS.
  • Clean it with an electronic contact cleaner.
  • Reinstall the TPS, reconnect, and reconnect the battery.

Replacing the TPS:

  • Disconnect the battery.
  • Remove the old TPS.
  • Get a matching replacement TPS.
  • Install the new TPS, reconnect, and reconnect the battery.
  • Calibrate if needed.
  • Test the vehicle for issues. If problems persist, consult a mechanic.

Related Blogs

P0123 Code: Throttle Position Sensor High Input Explained

The diagnostic trouble code P0123, which indicates a high input in the throttle or pedal position sensor circuit A. Exploring the potential causes, symptoms, and troubleshooting steps, we aim to provide a comprehensive understanding of this issue.

Jul 21, 2026

P0121 Code: Throttle Position Sensor Range/Performance Problem

By understanding and addressing code P0121 promptly and effectively, you can improve your vehicle's performance, fuel efficiency, emissions compliance, and overall longevity, helping you be a capable vehicle maintenance professional or enthusiastic.

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P0122 Code: Throttle Position Sensor Low Input Explained

The P0122 code indicates a faulty throttle position sensor (TPS) causing poor acceleration and idle issues. This guide details how to diagnose and replace the TPS to resolve the problem.

Jul 21, 2026