P2123 2002 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 2002 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 2002 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 2002 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 2002 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 2002 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 2002 Toyota Highlander code?
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Frequently Asked Questions about P2123 2002 Toyota Highlander Code
1. What does OBDII code P2123 mean for a 2002 Toyota Highlander?
The code P2123 indicates a Throttle Pedal Position Sensor/Switch 'D' Circuit Input High issue in the vehicle's electronic throttle control system.
2. What are common symptoms of OBDII code P2123 in a 2002 Toyota Highlander?
Common symptoms of code P2123 include reduced engine power, hesitation or surging during acceleration, and the vehicle going into limp mode.
3. What can cause the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High error in a 2002 Toyota Highlander?
The P2123 code in a 2002 Toyota Highlander is often triggered by a faulty throttle pedal position sensor, a damaged wiring harness, or a poor electrical connection.
4. How serious is OBDII code P2123 in a 2002 Toyota Highlander?
Code P2123 should be addressed promptly as it can impact the vehicle's drivability and fuel efficiency. Ignoring this issue may lead to further damage to engine components.
5. How can I diagnose OBDII code P2123 in my 2002 Toyota Highlander?
Diagnosing code P2123 typically involves using an OBDII scanner to retrieve the trouble codes, inspecting the throttle pedal position sensor, and checking the related wiring for any visible damage.
6. Can I still drive my 2002 Toyota Highlander with OBDII code P2123?
It is not recommended to drive the vehicle with code P2123 as it may lead to unsafe driving conditions and potential damage to the engine. It's best to address the issue promptly.
7. How can I repair OBDII code P2123 in my 2002 Toyota Highlander?
Repairing code P2123 may involve replacing the throttle pedal position sensor, repairing or replacing damaged wiring, and clearing the trouble codes with an OBDII scanner.
8. Are there any DIY tips for fixing OBDII code P2123 in a 2002 Toyota Highlander?
While some may attempt to replace the throttle pedal position sensor themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair of code P2123.
9. How much does it cost to fix OBDII code P2123 in a 2002 Toyota Highlander?
The cost of repairing code P2123 can vary depending on the extent of the issue, parts needed, and labor costs. It is advisable to obtain quotes from reputable auto repair shops.
10. Can resetting the OBDII codes clear P2123 in my 2002 Toyota Highlander?
Resetting the OBDII codes may temporarily clear the P2123 code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem.
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