Question about 1993 Buick LeSabre

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How to replace the Throttle position sensor

My check engine light is coming on and I found out that's because the throttle position sensor is going out. Is this the type of job that I could perform myself, and if so how? What tools are needed for this job?

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  • Anonymous Oct 18, 2008

    hard start not running

  • Anonymous Mar 15, 2014

    throttle position sensor found



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If you know what the throttle valve is then you can replace the sensor, it is over 1 end of the throttle valve shaft , it is held in place by 2 screws, they may be Torx style screws, not sure on your model.

Posted on Sep 22, 2008


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Posted on Jan 02, 2017


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What can cause the check engine light to be on?

Circuit Range Performance error.

When is the code detected? Malfunction is detected when an excessively low or high voltage from the sensor is sent to ECM. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) P0121 CHEVROLET Description The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

Read more:

chevrolet code was P0121 Google Search

Sep 04, 2017 | Chevrolet Cars & Trucks

1 Answer

When I push my gas pedal down about one inch the reduced power light comes on it don't stall just reduced power you shut the truck off restart it the light is off ,

The reduced power light is pertaining to the TAC - electronic throttle control . Is the check engine light lit ? If not still may have a DTC -diagnostic trouble code stored . You probably have a bad TPS - throttle position sensor .
Throttle Body Assembly
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signal, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.

Dec 31, 2015 | 2002 Chevrolet Chevrolet TrailBlazer EXT...

1 Answer

2007 Yukon XL - P01121 Throttle/Pedal Position Sensor A Circuit Range/Performance.

P1121 GMC - Throttle Position Sensor Circuit Intermittent High Voltage
This codes has nothing to do with APP - accelerator pedal position sensor . This has to do with the throttle body - TPS throttle position sensor . These have know problems ,the sensor an broken wire at throttle body , an when this happens the cruise control wont work . The throttle works by a DC motor controlled by the PCM - engine computer .

Dec 30, 2015 | Cars & Trucks

1 Answer

Reduced engine power

Have the vehicle checked for DTC'S - diagnostic trouble codes ! Do you know what electronic throttle control is ? The gas pedal assembly has electrical connector an sensors inside ,hooked to the PCM / ECM - engine computer . The engine computer uses these position sensors inputs to control the DC motor on the throttle body to open the throttle plate to control the speed . Plus there are position sensors inside the throttle body to input PCM/ECM to see if it's calculations are corect . Your best bet maybe to take it to a qualified repair shop .
Drive by Wire Function and diagnostics by Wells

Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
- Ignore accelerator pedal input.
• Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.

May 12, 2017 | 2004 GMC Sierra Denali

3 Answers

Why would throttle position sensor need to be replaced multiple times?

Sounds like the Voltage to the TPS is to high, burning them out to soon, unfortunately the only thing I can think of is a FULL COMPUTER DIAGNOSTIC !!

Nov 15, 2017 | 2004 Ford F-250 Super Duty

2 Answers

How to change a throttle position sensor on a 94 ford f150 5.0 4x4

How to Replace a Throttle Position Sensor
(DIY & Save up to $135.75 ) - Time: 2.1 hours

1. Throttle Position Sensor - $ 55.44

1. Scan Tool
2. Screwdriver
3. Multimeter

1. Locate the OBD data link connector (DLC). Refer to your owner’s manual for the specific location.
  • Tip: The OBD-I data link connector is usually located in the engine compartment near the battery or the fuse box. The OBD-II connector (post 1995 cars) is usually located beneath the instument panel next to the steering column.
2. Turn your key to the“ON” position. Do not start the engine.

3. Plug your scan tool into the OBD data link connector. Turn on the scan tool and select the appropriate steps to read the diagnostic trouble code (DTC).


Scanner plugged into OBD-II data link connector.
  • Tip: The OBD-II diagnostic trouble code (DTC) is a 5 character alphanumeric code. The first digit is a letter that indicates the component group, the second digit is OBD mandated or manufacturer specfic, the third digit is a subgroup, and the fourth and fifth digits define the component and basic problem.
  • 4. Locate the throttle position sensor.

  • Throttle position sensor

  • 5. Disconnect the electrical connector from the throttle position sensor.

  • Electrical connector removed
6. Test the resistance of the throttle position sensor (TPS) with a digital multi-meter. If the resistance is out of specifications, the TPS must be replaced.
  • 7. Remove the throttle position sensor.

  • d3a8007.jpg

    Removing sensor mounting screws

    8. Install the new throttle position sensor. Tighten the mounting screws and attach the electrical connector.
  • 9. Erase the diagnostic trouble code (DTC) with the scan tool using the“delete” or“erase” command. Road test your vehicle to see if the check engine light returns.

    Check engine light

  • Tip: If the check engine light returns, repeat the diagnostic process for additional DTCs or take your vehicle to a certified repair shop.
Direct OE replacement

Hope helped with this. Good luck (remember rated this help).

Nov 05, 2009 | Ford F-150 Cars & Trucks

1 Answer

No traction light

have u cleaned the throttle also check for a air leak on hoses hope this helps

Mar 10, 2009 | 2002 Chevrolet Cavalier Coupe

2 Answers

What are the diag codes for my 2005 sonata, 6 cyc. motor, the check engine lite comes on

Hyundai Specific Trouble Codes Code Description P1100 Manifold Absolute Pressure (MAP) Sensor Malfunction (Open/Short) P1102 Manifold Absolute Pressure (MAP) Sensor Malfunction - Low Voltage P1103 Manifold Absolute Pressure (MAP) Sensor Malfunction - High Voltage P1147 ETS Sub Accel Position Sensor 1 Malfunction P1151 ETS Main Accel Position Sensor 2 Malfunction P1155 ETS Limp Home Valve P1159 Variable Intake Motor Malfunction P1171 Electronic Throttle System Open P1172 Electronic Throttle System Motor Current P1173 Electronic Throttle System Rationality Malfunction P1174 Electronic Throttle System #1 Close Malfunction P1175 Electronic Throttle System #2 Close Malfunction P1176 ETS Motor Open/Short #1 P1176 ETS Motor Open/Short #2 P1178 ETS Motor Battery Voltage Open P1330 Spark Timing Adjust Malfunction P1521 Power Steering Switch Malfunction P1607 Electronic Throttle System Communication Error P1614 Electronic Throttle System Module Malfunction P1632
Go to this page for generic codes that are for all OBD 2 systems

Aug 29, 2008 | Hyundai Sonata Cars & Trucks

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