AutoCodesMitsubishi – P0120 Mitsubishi

P0120 Mitsubishi Code - Throttle Position Sensor Circuit Malfunction

Quick Answer

The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0120 Mitsubishi indicates Throttle Position Sensor Circuit Malfunction.
Common causes
Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 32,975
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0120 Mitsubishi 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.
OBDII Code P0120 Mitsubishi - Throttle Position Sensor Circuit Malfunction - AutoCodes.com
P0120 Mitsubishi Code - Throttle Position Sensor Circuit Malfunction

What are the Possible Causes of the DTC P0120 Mitsubishi?

  • Faulty Throttle Position Sensor
  • Throttle Position Sensor circuit is open or shorted
  • Throttle Position Sensor poor electrical connection

How to Fix the DTC P0120 Mitsubishi?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0120 Mitsubishi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0120 Mitsubishi code?

Need more information on how to fix the P0120 Mitsubishi code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0120 Mitsubishi Code

1. What are the common symptoms of OBDII code P0120 in a Mitsubishi related to the throttle position sensor circuit malfunction?

The common symptoms include issues with acceleration, poor engine performance, stalling, and difficulty maintaining a consistent speed.

2. What are the possible causes of the throttle position sensor circuit malfunction in a Mitsubishi triggering code P0120?

Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

3. How can I diagnose the throttle position sensor circuit malfunction causing OBDII code P0120 in my Mitsubishi?

Diagnosis involves using a scan tool to read the trouble code, testing the throttle position sensor for proper voltage output, and inspecting the sensor wiring for any damage or loose connections.

4. Can a dirty throttle body cause the OBDII code P0120 in a Mitsubishi?

Yes, a dirty or clogged throttle body can disrupt the proper functioning of the throttle position sensor, leading to the circuit malfunction and triggering code P0120.

5. What are some repair tips for addressing the throttle position sensor circuit malfunction in a Mitsubishi with OBDII code P0120?

Repair tips include cleaning the throttle body, checking and replacing the throttle position sensor if necessary, inspecting and repairing any damaged wiring, and resetting the trouble code after repairs are completed.

6. Is it safe to continue driving my Mitsubishi with the OBDII code P0120 related to the throttle position sensor circuit malfunction?

It is not recommended to continue driving the vehicle with this issue as it can lead to further engine performance problems and potential safety concerns. It is best to address the problem promptly.

7. Can resetting the trouble code associated with OBDII code P0120 fix the throttle position sensor circuit malfunction in a Mitsubishi?

Resetting the trouble code may temporarily clear the warning light, but it will not fix the underlying issue causing the throttle position sensor circuit malfunction. Proper diagnosis and repair are necessary.

8. How much does it typically cost to repair the throttle position sensor circuit malfunction triggering OBDII code P0120 in a Mitsubishi?

The cost of repair can vary depending on the extent of the issue, the need for sensor replacement, and labor charges. It is advisable to consult with a mechanic for a more accurate estimate.

9. Are there any preventative maintenance steps I can take to avoid the throttle position sensor circuit malfunction and OBDII code P0120 in my Mitsubishi?

Regularly cleaning the throttle body, inspecting sensor wiring for damage, and ensuring proper engine maintenance can help prevent issues with the throttle position sensor circuit.

10. Can a DIY enthusiast with basic automotive knowledge repair the throttle position sensor circuit malfunction causing OBDII code P0120 in a Mitsubishi?

While some basic repairs like sensor replacement or cleaning can be done by DIY enthusiasts, diagnosing complex issues with the throttle position sensor circuit may require specialized tools and expertise, so seeking professional help is advisable.

Discuss the causes and fixes for P0120 Mitsubishi OBDII Code

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