P0120 2001 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 2001 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 2001 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 2001 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 2001 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 2001 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.
Need more information about the P0120 2001 Toyota Highlander code?
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Frequently Asked Questions about P0120 2001 Toyota Highlander Code
1. What are the common symptoms of OBDII code P0120 in a 2001 Toyota Highlander?
- Common symptoms include issues with acceleration, decreased engine power, stalling, and possible difficulty shifting gears.
2. What does the OBDII code P0120 indicate specifically for a 2001 Toyota Highlander?
- The code indicates a malfunction in the Throttle Pedal Position Sensor/Switch 'A' circuit, which affects the communication between the throttle pedal and the engine control module.
3. What are the possible causes of OBDII code P0120 in a 2001 Toyota Highlander?
- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the circuit, a malfunctioning engine control module, or issues with the throttle pedal itself.
4. How can I diagnose the Throttle Pedal Position Sensor/Switch 'A' circuit malfunction in my 2001 Toyota Highlander?
- Diagnosis typically involves using a scan tool to retrieve the trouble code, checking the wiring and connectors for damage, testing the throttle position sensor for proper voltage and resistance, and verifying the signal between the sensor and the engine control module.
5. Can I still drive my 2001 Toyota Highlander with OBDII code P0120?
- It is not recommended to drive the vehicle with this code present, as it can lead to unsafe driving conditions and potential damage to the engine or other components.
6. How can I repair the Throttle Pedal Position Sensor/Switch 'A' circuit malfunction in my 2001 Toyota Highlander?
- Repair options may include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, resetting the engine control module, or seeking professional assistance for further diagnosis and repair.
7. Will resetting the OBDII code P0120 in my 2001 Toyota Highlander fix the issue?
- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the Throttle Pedal Position Sensor/Switch 'A' circuit malfunction.
8. How much does it typically cost to repair OBDII code P0120 in a 2001 Toyota Highlander?
- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.
9. Are there any preventative maintenance tips to avoid OBDII code P0120 in my 2001 Toyota Highlander?
- Regularly inspecting and maintaining the throttle system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of this code.
10. Can a DIY enthusiast repair OBDII code P0120 in a 2001 Toyota Highlander?
- Depending on the mechanical skill level and access to tools, a DIY enthusiast may be able to diagnose and repair some causes of the Throttle Pedal Position Sensor/Switch 'A' circuit malfunction, but seeking professional assistance is recommended for accurate diagnosis and proper repair.
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