P0120 2004 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 2004 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 2004 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 2004 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 2004 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 2004 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 2004 Toyota Highlander code?
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Frequently Asked Questions about P0120 2004 Toyota Highlander Code
1. What are the common symptoms of OBDII code P0120 in a 2004 Toyota Highlander?
The common symptoms of OBDII code P0120 in a 2004 Toyota Highlander include unresponsive throttle, erratic engine performance, and potential stalling.
2. What causes the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in a 2004 Toyota Highlander?
The P0120 code in a 2004 Toyota Highlander is typically caused by a faulty throttle position sensor, damaged wiring, or a poor connection in the throttle pedal position sensor circuit.
3. How can I diagnose the cause of OBDII code P0120 in my 2004 Toyota Highlander?
To diagnose the cause of the P0120 code, you can use a scan tool to check for other related trouble codes, visually inspect the throttle position sensor and its wiring, and perform electrical tests to pinpoint the issue.
4. Can I drive my 2004 Toyota Highlander with OBDII code P0120?
It is not recommended to drive your 2004 Toyota Highlander with the P0120 code as it can lead to unsafe driving conditions due to potential throttle issues and engine performance problems.
5. How can I repair OBDII code P0120 in a 2004 Toyota Highlander?
Repairing the P0120 code in a 2004 Toyota Highlander involves replacing the throttle position sensor, repairing any damaged wiring, and ensuring a secure connection in the throttle pedal position sensor circuit.
6. Are there any DIY tips for fixing OBDII code P0120 in a 2004 Toyota Highlander?
While it is possible to replace the throttle position sensor yourself, it is recommended to have a professional mechanic diagnose and repair the P0120 code to ensure proper installation and calibration.
7. Will resetting the OBDII code P0120 in my 2004 Toyota Highlander make it go away permanently?
Simply resetting the P0120 code may temporarily clear the check engine light, but if the underlying issue causing the code is not fixed, the code is likely to return after driving the vehicle.
8. Is the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction a common issue in 2004 Toyota Highlanders?
The P0120 code related to the throttle pedal position sensor circuit malfunction is a known issue in some 2004 Toyota Highlanders, especially as the vehicle ages and the sensor may wear out.
9. Can a dirty throttle body cause OBDII code P0120 in a 2004 Toyota Highlander?
While a dirty throttle body can cause related performance issues, the P0120 code itself is usually directly related to a malfunction in the throttle pedal position sensor circuit rather than the throttle body.
10. How much does it cost to repair OBDII code P0120 in a 2004 Toyota Highlander?
The cost of repairing the P0120 code in a 2004 Toyota Highlander can vary depending on the exact cause of the issue, but it typically ranges from $150 to $300 for parts and labor.
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