P2123 2007 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High
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
- P2123 2007 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
- 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 P2123 2007 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 P2123 2007 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 P2123 2007 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 P2123 2007 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 P2123 2007 Toyota Highlander code?
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Frequently Asked Questions about P2123 2007 Toyota Highlander Code
1. What does OBDII code P2123 mean on a 2007 Toyota Highlander?
The code P2123 indicates an issue with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
2. What are the common symptoms of OBDII code P2123 in a 2007 Toyota Highlander?
Common symptoms of P2123 may include loss of power, reduced acceleration, engine stalling, and the vehicle going into limp mode.
3. What are the possible causes of OBDII code P2123 in a 2007 Toyota Highlander?
Potential causes of P2123 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 OBDII code P2123 in my 2007 Toyota Highlander?
Diagnosing P2123 typically involves using a scan tool to read the code, checking the throttle pedal position sensor's voltage output, and inspecting the sensor's wiring and connectors for any damage.
5. Is it safe to drive with OBDII code P2123 present in a 2007 Toyota Highlander?
It is not recommended to drive with code P2123 active, as it can lead to unsafe driving conditions due to potential loss of power and control.
6. Can I repair OBDII code P2123 in a 2007 Toyota Highlander myself?
Depending on your level of automotive expertise, you may be able to repair P2123 yourself by replacing the throttle pedal position sensor or addressing any wiring issues. Otherwise, it's best to consult a professional mechanic.
7. How much does it typically cost to repair OBDII code P2123 in a 2007 Toyota Highlander?
The cost of repairing P2123 can vary depending on the specific cause of the issue. Replacing a faulty throttle pedal position sensor may range from $100 to $300, while addressing wiring problems or module issues could increase the cost.
8. Will resetting the OBDII code P2123 in my 2007 Toyota Highlander make it go away permanently?
Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing P2123 is not fixed, the code is likely to reappear.
9. Can extreme weather conditions affect the occurrence of OBDII code P2123 in a 2007 Toyota Highlander?
Extreme weather conditions such as extreme heat or cold may sometimes exacerbate issues with the throttle pedal position sensor, potentially leading to the triggering of code P2123.
10. How often should I have the throttle pedal position sensor checked to prevent OBDII code P2123 in my 2007 Toyota Highlander?
It's recommended to include a thorough sensor inspection as part of your regular vehicle maintenance routine, especially if you notice any symptoms associated with P2123.
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