P0120 2009 Toyota Prius Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction
Quick Answer
The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty Throttle Position Sensor, 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 2009 Toyota Prius indicates Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction.
- Common causes
- Common causes include Faulty Throttle Position Sensor, 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 2009 Toyota Prius Description
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.
What are the Possible Causes of the DTC P0120 2009 Toyota Prius?
- Faulty Throttle Position Sensor
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection
How to Fix the DTC P0120 2009 Toyota Prius?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0120 2009 Toyota Prius 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 P0120 2009 Toyota Prius code?
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Frequently Asked Questions about P0120 2009 Toyota Prius Code
1. What does OBDII code P0120 for a 2009 Toyota Prius indicate?
The code P0120 in a 2009 Toyota Prius indicates a Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction.
2. What are the common symptoms of a Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in a 2009 Toyota Prius?
Common symptoms of this issue may include issues with acceleration, poor engine performance, and the vehicle going into limp mode.
3. What are the possible causes of OBDII code P0120 in a 2009 Toyota Prius?
Possible causes of code P0120 in a 2009 Toyota Prius include a faulty throttle position sensor, issues with the throttle pedal position switch, or wiring/connectivity problems.
4. How can I diagnose the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in my 2009 Toyota Prius?
Diagnosing this issue may involve checking the throttle position sensor's voltage, inspecting the wiring and connectors for damage, and conducting a thorough visual inspection of the throttle pedal assembly.
5. Can I continue driving my 2009 Toyota Prius with OBDII code P0120 active?
It is not recommended to continue driving your Prius with an active P0120 code, as it can lead to further damage and potential safety hazards.
6. How can I repair OBDII code P0120 in a 2009 Toyota Prius?
Repairing code P0120 may involve replacing the throttle position sensor, fixing any wiring issues, or recalibrating the throttle pedal position switch, depending on the root cause of the problem.
7. Will resetting the OBDII code P0120 in my 2009 Toyota Prius make it go away permanently?
Simply resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.
8. Can a DIY enthusiast fix the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in a 2009 Toyota Prius?
While some aspects of diagnosing and repairing this issue can be done by a DIY enthusiast, it is recommended to seek professional help for a thorough diagnosis and proper repair.
9. Is it safe to clear the OBDII code P0120 in a 2009 Toyota Prius using a scan tool?
Clearing the code using a scan tool is safe and can be done once the underlying issue has been diagnosed and resolved to ensure the problem does not return.
10. How much can I expect to pay to repair OBDII code P0120 in a 2009 Toyota Prius?
The cost of repairing code P0120 can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor at a repair shop.
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