P0123 2007 Toyota Prius Code - Throttle Position Sensor/Switch 'A' Circuit High Input
Quick Answer
The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle 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
- P0123 2007 Toyota Prius indicates Throttle Position Sensor/Switch 'A' Circuit High Input.
- Common causes
- Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle 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 P0123 2007 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 P0123 2007 Toyota Prius?
- Faulty throttle position sensor
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
How to Fix the DTC P0123 2007 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 P0123 2007 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.
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Frequently Asked Questions about P0123 2007 Toyota Prius Code
1. What are the common symptoms of OBDII code P0123 in a 2007 Toyota Prius?
- Common symptoms include poor acceleration, rough idling, stalling, and potential issues with the vehicle's transmission shifting.
2. What can cause the Throttle Position Sensor/Switch 'A' Circuit High Input error in a 2007 Toyota Prius?
- The primary causes of this error are a faulty throttle position sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).
3. How can I diagnose the Throttle Position Sensor/Switch 'A' Circuit High Input issue in my 2007 Toyota Prius?
- You can use an OBDII scanner to read the error code, visually inspect the throttle position sensor and its wiring, and perform voltage tests on the sensor.
4. Can I drive my 2007 Toyota Prius with the P0123 error code?
- It is not recommended to drive your vehicle with this error code present, as it can lead to potential safety hazards and further damage to the engine.
5. How do I repair the Throttle Position Sensor/Switch 'A' Circuit High Input problem in my 2007 Toyota Prius?
- Repairing this issue typically involves replacing the throttle position sensor, repairing or replacing damaged wiring, or reprogramming the engine control module (ECM).
6. Is it possible to reset the OBDII code P0123 in a 2007 Toyota Prius without fixing the underlying issue?
- While you can clear the error code using an OBDII scanner, the issue will likely return if the root cause of the problem is not addressed.
7. Can a dirty throttle body cause the P0123 error code in a 2007 Toyota Prius?
- While a dirty throttle body can cause related issues, the P0123 error code is specifically related to the throttle position sensor or its circuitry.
8. How much does it typically cost to repair the Throttle Position Sensor/Switch 'A' Circuit High Input issue in a 2007 Toyota Prius?
- The cost of repairs can vary depending on the specific cause of the problem, but it may range from $100 to $300 for parts and labor.
9. Will the P0123 error code cause my 2007 Toyota Prius to fail an emissions test?
- Yes, the presence of this error code can cause your vehicle to fail an emissions test, as it indicates a malfunction in the throttle position sensor circuit.
10. Can I fix the Throttle Position Sensor/Switch 'A' Circuit High Input error in my 2007 Toyota Prius myself?
- If you have experience with automotive repairs and the necessary tools, you may be able to fix this issue yourself by following a detailed repair guide or seeking assistance from a knowledgeable source.
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