P0120 2002 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'A' 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 2002 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'A' 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.
Code P0120 2002 Toyota Highlander Description
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.
What are the Possible Causes of the DTC P0120 2002 Toyota Highlander?
- Faulty Throttle Position Sensor
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection
How to Fix the DTC P0120 2002 Toyota Highlander?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0120 2002 Toyota Highlander 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.
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Frequently Asked Questions about P0120 2002 Toyota Highlander Code
1. What are common symptoms of OBDII code P0120 on a 2002 Toyota Highlander?
- Common symptoms include issues with acceleration, reduced engine power, and potential stalling of the vehicle.
2. What causes the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in a 2002 Toyota Highlander?
- The code P0120 is typically triggered by a faulty throttle position sensor, damaged wiring, or a problem with the throttle pedal position switch.
3. How can I diagnose the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction on my 2002 Toyota Highlander?
- Diagnosis involves using an OBDII scanner to read the code, checking the throttle position sensor's voltage, and inspecting the related wiring for any visible damage.
4. Can I drive my 2002 Toyota Highlander with OBDII code P0120?
- It is not recommended to drive with code P0120 as it can lead to unsafe driving conditions and potential damage to the vehicle.
5. How much does it cost to repair OBDII code P0120 on a 2002 Toyota Highlander?
- The cost of repair can vary depending on the exact cause of the issue, but it typically ranges from $150 to $400 for parts and labor.
6. Are there any DIY tips for fixing the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction on my 2002 Toyota Highlander?
- DIY tips include checking and cleaning the throttle body, inspecting the throttle position sensor connections, and ensuring all wiring is secure and undamaged.
7. Will resetting the OBDII code P0120 on my 2002 Toyota Highlander make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but the underlying issue causing the code will need to be addressed to prevent it from reoccurring.
8. How long does it take to repair the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction on a 2002 Toyota Highlander?
- Repair time can vary based on the exact cause of the issue, but it typically takes 1-2 hours for a professional mechanic to diagnose and fix the problem.
9. Can a faulty throttle position sensor cause other issues besides triggering code P0120 on a 2002 Toyota Highlander?
- Yes, a faulty throttle position sensor can cause poor fuel economy, rough idling, and issues with shifting gears in addition to triggering the P0120 code.
10. Is it safe to continue driving my 2002 Toyota Highlander if the throttle pedal position sensor is malfunctioning?
- It is not safe to drive the vehicle with a malfunctioning throttle position sensor as it can lead to unpredictable acceleration and potential loss of control.
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