P2120 2002 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D' Circuit
Quick Answer
The Accelerator Pedal Position (APP) sensor is mounted on the accelerator pedal to detect the angle of the accelerator pedal. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit 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
- P2120 2002 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'D' Circuit.
- Common causes
- Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit 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 P2120 2002 Toyota Highlander Description
In the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the Engine Control Module (ECM) changes between 0 V and 5 V in proportion to the angle of the accelerator pedal. The VPA is a signal to indicate the actual accelerator pedal angle and is used for the engine control. VPA2 is used to detect malfunctions of the sensor itself.
The ECM monitors the accelerator pedal angle from VPA and VPA2 signal outputs, and controls the throttle motor based on these signals.
What are the Possible Causes of the DTC P2120 2002 Toyota Highlander?
- Faulty Accelerator Pedal Position (APP) Sensor
- Accelerator Pedal Position (APP) Sensor harness is open or shorted
- Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2120 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2120 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 P2120 2002 Toyota Highlander Code
1. What are the common symptoms of OBDII code P2120 in a 2002 Toyota Highlander?
The common symptoms of code P2120 include engine stalling, lack of acceleration, rough idling, and an illuminated Check Engine Light.
2. What does the Throttle Pedal Position Sensor/Switch 'D' Circuit refer to in the context of OBDII code P2120?
The Throttle Pedal Position Sensor/Switch 'D' Circuit refers to a malfunction related to the electronic sensor responsible for monitoring the position of the throttle pedal in the vehicle.
3. What are the possible causes of OBDII code P2120 in a 2002 Toyota Highlander?
Possible causes of code P2120 can include a faulty throttle pedal position sensor, wiring issues in the circuit, a defective throttle body, or a problem with the engine control module (ECM).
4. How can I diagnose the Throttle Pedal Position Sensor/Switch 'D' Circuit issue causing OBDII code P2120 in my Toyota Highlander?
Diagnosing the issue involves using a scan tool to retrieve the trouble code, inspecting the throttle pedal position sensor and its wiring for damage, and testing the sensor's functionality using a multimeter.
5. Can I continue to drive my Toyota Highlander with OBDII code P2120 present?
It is not recommended to drive your vehicle with code P2120 present, as it can lead to performance issues and potential safety hazards. It's best to address the problem promptly.
6. Are there any DIY repair tips for fixing OBDII code P2120 in a 2002 Toyota Highlander?
DIY repair tips include checking and cleaning the throttle pedal position sensor connector, ensuring proper wiring connections, and resetting the ECM after any repairs are made.
7. How much does it typically cost to repair OBDII code P2120 in a Toyota Highlander?
The cost of repairing code P2120 can vary depending on the specific cause of the issue. On average, it can range from $100 to $300 for parts and labor.
8. Can a faulty throttle pedal position sensor cause other OBDII codes besides P2120 in a Toyota Highlander?
Yes, a faulty throttle pedal position sensor can cause other related OBDII codes such as P2121, P2122, and P2123, which indicate different issues with the sensor circuit.
9. Will resetting the Check Engine Light resolve OBDII code P2120 in a Toyota Highlander?
Resetting the Check Engine Light may temporarily clear the code, but it will not fix the underlying issue causing code P2120. Proper diagnosis and repair are necessary to resolve the problem.
10. How long does it typically take to repair OBDII code P2120 in a Toyota Highlander?
The repair time for code P2120 can vary based on the cause of the issue and the expertise of the technician. In most cases, it can take anywhere from 1 to 3 hours to diagnose and repair the problem.
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