P0122 2002 Toyota Highlander Code - Throttle Position Sensor/Switch 'A' Circuit Low Input
Quick Answer
The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position 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
- P0122 2002 Toyota Highlander indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
- Common causes
- Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position 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 P0122 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 P0122 2002 Toyota Highlander?
- Faulty throttle position sensor
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
How to Fix the DTC P0122 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 P0122 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.
Need more information about the P0122 2002 Toyota Highlander code?
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Frequently Asked Questions about P0122 2002 Toyota Highlander Code
1. What are the common symptoms of OBDII code P0122 in a 2002 Toyota Highlander?
The common symptoms of code P0122 include poor acceleration, rough idling, stalling, and decreased fuel efficiency.
2. What does the Throttle Position Sensor/Switch 'A' Circuit Low Input mean for a 2002 Toyota Highlander?
The code P0122 indicates that the throttle position sensor is sending a low voltage signal to the engine control module, potentially causing drivability issues.
3. What are the possible causes of the Throttle Position Sensor/Switch 'A' Circuit Low Input in a 2002 Toyota Highlander?
Possible causes of code P0122 include a faulty throttle position sensor, damaged wiring or connectors, a dirty throttle body, or a malfunctioning engine control module.
4. How can I diagnose the Throttle Position Sensor/Switch 'A' Circuit Low Input in my 2002 Toyota Highlander?
To diagnose code P0122, you can use an OBDII scanner to check for the code and perform a visual inspection of the throttle position sensor, wiring, and connectors. You may also need to test the sensor's voltage output.
5. What are some repair tips for fixing OBDII code P0122 in a 2002 Toyota Highlander?
Repair tips for code P0122 include cleaning the throttle body, checking and replacing damaged wiring or connectors, and replacing the throttle position sensor if necessary.
6. Can I drive my 2002 Toyota Highlander with OBDII code P0122?
It is not recommended to drive your vehicle with code P0122 as it can lead to poor engine performance and potential safety hazards. It is best to address the issue promptly.
7. How much does it typically cost to repair OBDII code P0122 in a 2002 Toyota Highlander?
The cost of repairing code P0122 can vary depending on the cause of the issue. Replacing a faulty throttle position sensor can cost between $100 to $200, while addressing wiring or connector issues may involve additional labor costs.
8. Will resetting the check engine light fix OBDII code P0122 in a 2002 Toyota Highlander?
Simply resetting the check engine light will not fix the underlying issue causing code P0122. It is important to diagnose the problem and make the necessary repairs to prevent the code from reoccurring.
9. How long does it take to repair OBDII code P0122 in a 2002 Toyota Highlander?
The time needed to repair code P0122 can vary depending on the exact cause and the extent of the repairs required. In general, it may take a few hours to a full day for a professional technician to diagnose and fix the issue.
10. Can a DIY enthusiast repair OBDII code P0122 in a 2002 Toyota Highlander?
While some DIY enthusiasts may have the skills to diagnose and repair code P0122, it is recommended to consult a professional technician for accurate diagnosis and proper repair to ensure the issue is resolved correctly.
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