P2122 2001 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 2001 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 2001 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 2001 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 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2122 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.
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Frequently Asked Questions about P2122 2001 Toyota Highlander Code
1. What does the OBDII code P2122 on a 2001 Toyota Highlander mean?
The code P2122 indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low in your vehicle.
2. What are the common symptoms of a P2122 code in a 2001 Toyota Highlander?
Common symptoms of a P2122 code may include reduced engine power, hesitation during acceleration, and the vehicle going into limp mode.
3. What can cause the Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low code in a 2001 Toyota Highlander?
The P2122 code can be triggered by issues such as a faulty throttle pedal position sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).
4. How can I diagnose the P2122 code in my 2001 Toyota Highlander?
To diagnose the P2122 code, you can use an OBDII scanner to read the code, inspect the throttle pedal position sensor and its connections, and perform a thorough visual inspection of related wiring.
5. What are the possible repair options for a P2122 code in a 2001 Toyota Highlander?
Repair options for a P2122 code may include replacing the throttle pedal position sensor, repairing or replacing damaged wiring, and resetting the ECM to clear the code.
6. Is it safe to drive a 2001 Toyota Highlander with a P2122 code?
It is not recommended to drive your vehicle with a P2122 code, as it can lead to further damage and safety risks. It's best to address the issue promptly.
7. Can a DIY enthusiast fix a P2122 code in a 2001 Toyota Highlander?
Depending on your skill level and access to tools, some DIY enthusiasts may be able to address a P2122 code by replacing the throttle pedal position sensor or repairing damaged wiring.
8. How much does it cost to repair a P2122 code in a 2001 Toyota Highlander?
The cost of repairing a P2122 code can vary based on the root cause of the issue, parts needed, and labor rates. It's advisable to consult a mechanic for an accurate estimate.
9. Will a P2122 code reset itself in a 2001 Toyota Highlander?
In some cases, a P2122 code may reset itself after the underlying issue is addressed. However, it's recommended to clear the code using an OBDII scanner to prevent recurring problems.
10. How can I prevent the P2122 code from reoccurring in my 2001 Toyota Highlander?
To prevent the P2122 code from reoccurring, regularly inspect and maintain the throttle pedal position sensor, keep an eye on wiring integrity, and address any related issues promptly.
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