P2122 2006 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 2006 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 2006 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 2006 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 2006 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 2006 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 2006 Toyota Highlander code?
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Frequently Asked Questions about P2122 2006 Toyota Highlander Code
1. What are the common symptoms of OBDII code P2122 in a 2006 Toyota Highlander?
The common symptoms of OBDII code P2122 include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.
2. What does the Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low mean for a 2006 Toyota Highlander?
The code P2122 indicates that the Engine Control Module (ECM) has detected a low voltage signal from the throttle pedal position sensor or switch 'D' circuit.
3. What are the possible causes of OBDII code P2122 in a 2006 Toyota Highlander?
The possible causes of code P2122 include a faulty throttle pedal position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the ECM.
4. How can I diagnose OBDII code P2122 in my 2006 Toyota Highlander?
Diagnosing code P2122 involves checking the throttle pedal position sensor for proper voltage output, inspecting the sensor wiring and connectors for damage, and testing the ECM's communication with the sensor.
5. Can I still drive my 2006 Toyota Highlander with OBDII code P2122?
It is not recommended to drive your vehicle with OBDII code P2122, as it can lead to poor performance and potential safety issues. It's best to address the underlying problem promptly.
6. How can I repair OBDII code P2122 in my 2006 Toyota Highlander?
To repair code P2122, you may need to replace the throttle pedal position sensor, repair any damaged wiring or connectors, or reprogram the ECM if necessary.
7. Will resetting the ECM clear OBDII code P2122 in my 2006 Toyota Highlander?
Resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return. It's important to diagnose and repair the root cause of the problem.
8. Is OBDII code P2122 a common issue in 2006 Toyota Highlanders?
While not extremely common, OBDII code P2122 can occur in 2006 Toyota Highlanders due to sensor failures, wiring issues, or ECM malfunctions.
9. Can a DIY enthusiast fix OBDII code P2122 in a 2006 Toyota Highlander?
Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P2122 by following the manufacturer's repair procedures and using the appropriate diagnostic equipment.
10. How much does it cost to repair OBDII code P2122 in a 2006 Toyota Highlander?
The cost of repairing code P2122 can vary depending on the exact cause of the issue. Replacing the throttle pedal position sensor or repairing wiring may cost a few hundred dollars, while ECM replacement could be more expensive.
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