P0120 2018 Toyota RAV4 Code - Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction
Quick Answer
The throttle position sensor is mounted on the throttle with motor body assembly and detects the opening angle of the throttle valve. Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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
- P0120 2018 Toyota RAV4 indicates Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction.
- Common causes
- Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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 P0120 2018 Toyota RAV4 Description
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The Engine Control Module (ECM) calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction, and fuel-cut control.
The ECM uses the throttle position sensor to monitor the throttle valve opening angle. There are several checks that the ECM performs to confirm the proper operation of the throttle position sensor.
This sensor transmits two signals, if the output voltage difference between the two signals deviates from the normal operating range, the ECM interprets this as a malfunction in the throttle position sensor. The ECM illuminates the MIL and stores the Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P0120 2018 Toyota RAV4?
- Faulty Throttle Position Sensor (built into Throttle Body Assembly)
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0120 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.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0120 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 P0120 2018 Toyota RAV4 Code
1. What are the common symptoms of OBDII code P0120 in a 2018 Toyota RAV4?
- Common symptoms include issues with acceleration, throttle response, and potential stalling of the vehicle.
2. What could cause the Throttle / Pedal Position Sensor 'A' Circuit Malfunction in a 2018 Toyota RAV4?
- Common causes of this code include a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle body.
3. How can I diagnose the Throttle / Pedal Position Sensor issue in my 2018 Toyota RAV4?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code and then inspecting the throttle position sensor, wiring, and connectors for any visible damage.
4. Can I drive my 2018 Toyota RAV4 with OBDII code P0120?
- It is not recommended to drive the vehicle with this code present as it can lead to further damage and potential safety hazards.
5. How difficult is it to repair the Throttle / Pedal Position Sensor 'A' Circuit Malfunction in a 2018 Toyota RAV4?
- The repair difficulty can vary depending on the exact cause of the issue, but it typically involves replacing the faulty throttle position sensor or repairing any damaged wiring.
6. Will resetting the OBDII code P0120 in my 2018 Toyota RAV4 resolve the issue?
- Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the Throttle / Pedal Position Sensor malfunction.
7. Are there any tips to prevent OBDII code P0120 from occurring in my 2018 Toyota RAV4?
- Regular maintenance, such as checking and cleaning the throttle body, inspecting wiring connections, and using quality fuel, can help prevent issues with the throttle position sensor.
8. How much does it cost to repair OBDII code P0120 in a 2018 Toyota RAV4?
- The cost can vary depending on the exact cause of the problem, but it may range from $100 to $300 for parts and labor.
9. Can a DIY enthusiast fix the Throttle / Pedal Position Sensor issue in a 2018 Toyota RAV4?
- While some experienced DIY enthusiasts may be able to replace the throttle position sensor themselves, it is recommended to consult a professional for an accurate diagnosis and repair.
10. Will ignoring OBDII code P0120 affect the performance of my 2018 Toyota RAV4?
- Ignoring the code can lead to decreased fuel efficiency, drivability issues, and potential damage to other engine components over time. It is best to address the problem promptly.
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