P2122 2003 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low
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
- P2122 2003 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low.
- 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 P2122 2003 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 P2122 2003 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 P2122 2003 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 P2122 2003 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 P2122 2003 Toyota Highlander code?
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Frequently Asked Questions about P2122 2003 Toyota Highlander Code
1. What are the common symptoms of OBDII code P2122 in a 2003 Toyota Highlander?
- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into "limp mode."
2. What does the OBDII code P2122 indicate in a 2003 Toyota Highlander?
- The code P2122 indicates an issue with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input being lower than expected.
3. What are the possible causes of OBDII code P2122 in a 2003 Toyota Highlander?
- Possible causes include a faulty throttle pedal position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module.
4. How can I diagnose the cause of OBDII code P2122 in my 2003 Toyota Highlander?
- You can use a scan tool to check for any additional related codes, visually inspect the throttle pedal sensor and its wiring, and perform tests to check the sensor's resistance.
5. Can I drive my 2003 Toyota Highlander with OBDII code P2122?
- It is not recommended to drive the vehicle with this code as it can affect the engine's performance and may lead to safety issues. It's best to address the issue promptly.
6. How can I repair OBDII code P2122 in my 2003 Toyota Highlander?
- Repair options include replacing the throttle pedal position sensor, repairing any damaged wiring or connectors, or reprogramming the engine control module if needed.
7. Will resetting the OBDII code P2122 in my 2003 Toyota Highlander fix the issue?
- Resetting the code may temporarily clear the check engine light, but it will not fix the underlying problem causing the code to trigger. Proper diagnosis and repair are needed.
8. How much does it typically cost to repair OBDII code P2122 in a 2003 Toyota Highlander?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.
9. Can a DIY enthusiast fix OBDII code P2122 in a 2003 Toyota Highlander?
- Depending on your level of expertise, you may be able to replace the throttle pedal position sensor yourself. However, proper diagnosis is crucial to ensure the correct repair.
10. How long does it take to repair OBDII code P2122 in a 2003 Toyota Highlander?
- The repair time can vary based on the exact cause of the issue and the availability of parts. It may take anywhere from 1 to 3 hours for a professional mechanic to complete the repair.
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