P2123 2001 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 2001 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 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 P2123 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 P2123 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 P2123 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 P2123 2001 Toyota Highlander Code
1. What are the common symptoms of OBDII code P2123 in a 2001 Toyota Highlander?
The common symptoms include the engine stalling, lack of power, rough idling, and the vehicle going into limp mode.
2. What does the OBDII code P2123 indicate in a 2001 Toyota Highlander?
The code P2123 indicates an issue with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
3. What are the possible causes of OBDII code P2123 in a 2001 Toyota Highlander?
Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning electronic throttle control system, or a problem with the engine control module.
4. How can I diagnose the OBDII code P2123 in my 2001 Toyota Highlander?
Diagnosing this code involves checking the throttle position sensor for proper operation, inspecting the wiring and connectors for any damage, and using a scan tool to monitor sensor data.
5. Can I still drive my 2001 Toyota Highlander with the OBDII code P2123?
It is not recommended to drive the vehicle with this code present, as it can lead to potential safety hazards and engine performance issues.
6. How can I repair OBDII code P2123 in my 2001 Toyota Highlander?
Repairing this code may involve replacing the throttle position sensor, repairing any damaged wiring or connectors, resetting the engine control module, or addressing any issues with the electronic throttle control system.
7. Is it safe to continue driving my 2001 Toyota Highlander if the throttle pedal position sensor is faulty?
Driving with a faulty throttle pedal position sensor can be unsafe, as it can cause erratic engine behavior and potentially lead to a loss of control while driving.
8. How much does it typically cost to repair OBDII code P2123 in a 2001 Toyota Highlander?
The cost of repairing this code can vary depending on the specific issue and the labor rates of the repair shop, but it may range from $100 to $300 or more.
9. Can I reset the OBDII code P2123 in my 2001 Toyota Highlander by disconnecting the battery?
While disconnecting the battery may clear the code temporarily, it is not a recommended method for resolving the underlying issue causing the code to appear.
10. Will the OBDII code P2123 in my 2001 Toyota Highlander cause permanent damage if not addressed promptly?
Continuing to drive the vehicle with this code present can potentially cause further damage to the engine or other components, so it is important to address the issue promptly.
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