P2123 2018 Toyota RAV4 Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High
Quick Answer
The Accelerator Pedal Position (APP) sensor is built into the accelerator pedal sensor assembly and has 2 sensor circuits: VPA (main) and VPA2 (sub). Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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 2018 Toyota RAV4 indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
- Common causes
- Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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 2018 Toyota RAV4 Description
The ECM monitors the actual accelerator pedal opening angle (throttle valve opening angle) through the signals from VPA and VPA2 and controls the throttle actuator according to these signals.
When either the output voltage of VPA or VPA2 deviates from the standard range, or the difference between the output voltages of the 2 sensor circuits is more than the threshold, the ECM determines that there is a malfunction in the accelerator pedal position sensor. The ECM then illuminates the MIL and stores a Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P2123 2018 Toyota RAV4?
- Faulty Accelerator Pedal Position (APP) Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2123 2018 Toyota RAV4?
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 2018 Toyota RAV4 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 2018 Toyota RAV4 Code
1. What does OBDII code P2123 mean on a 2018 Toyota RAV4?
P2123 indicates a high input voltage issue in the Throttle Pedal Position Sensor/Switch "D" circuit, suggesting a potential fault in the sensor or its wiring.
2. What are the common symptoms of code P2123 in a 2018 Toyota RAV4?
Common symptoms include reduced engine performance, difficulty accelerating, the vehicle entering limp mode, and an illuminated check engine light.
3. What causes the P2123 code to appear in a 2018 Toyota RAV4?
Possible causes include a faulty throttle pedal position sensor, damaged or corroded wiring, a loose or disconnected electrical connector, or a malfunctioning engine control module (ECM).
4. Can I drive my 2018 Toyota RAV4 with a P2123 code?
Driving with a P2123 code is not recommended, as it may result in limited acceleration or limp mode, which could pose safety risks in traffic.
5. How do I diagnose the P2123 code on a 2018 Toyota RAV4?
Diagnosis involves using a scan tool to confirm the code, inspecting the throttle pedal position sensor and its wiring for damage, and checking for proper voltage and ground signals.
6. How do I fix the P2123 code on a 2018 Toyota RAV4?
Repairs may include replacing the throttle pedal position sensor, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool.
7. What tools are needed to fix a P2123 code on a 2018 Toyota RAV4?
You’ll need a diagnostic scan tool, a multimeter to check voltage and continuity, and basic hand tools for removing and replacing components.
8. How much does it cost to repair the P2123 code on a 2018 Toyota RAV4?
Repair costs vary but typically range from $100 to $300, depending on whether the sensor, wiring, or other components need replacement.
9. Can a dirty throttle body cause the P2123 code in a 2018 Toyota RAV4?
A dirty throttle body is unlikely to cause P2123, as the code specifically relates to the throttle pedal position sensor, not the throttle body.
10. Does clearing the P2123 code fix the issue in a 2018 Toyota RAV4?
Clearing the code may temporarily reset the check engine light, but the underlying issue must be resolved to prevent the code from returning.
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