P0122 2001 Toyota Highlander Code - Throttle Position Sensor/Switch 'A' Circuit Low Input
Quick Answer
The Throttle Pedal Position (TPP) 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
- P0122 2001 Toyota Highlander indicates Throttle Position Sensor/Switch 'A' Circuit Low 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 P0122 2001 Toyota Highlander 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 P0122 2001 Toyota Highlander?
- Faulty throttle position sensor
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
How to Fix the DTC P0122 2001 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 P0122 2001 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.
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Frequently Asked Questions about P0122 2001 Toyota Highlander Code
1. What are the common symptoms of OBDII code P0122 in a 2001 Toyota Highlander?
- Common symptoms include poor acceleration, idling issues, stalling, and decreased fuel efficiency.
2. What does the OBDII code P0122 indicate in a 2001 Toyota Highlander?
- The code P0122 indicates a low input signal from the throttle position sensor/switch 'A' circuit.
3. What are the possible causes of OBDII code P0122 in a 2001 Toyota Highlander?
- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).
4. How can I diagnose the OBDII code P0122 in my 2001 Toyota Highlander?
- Diagnosis involves checking the throttle position sensor's voltage output, inspecting the wiring and connectors for damage, and testing the ECM for proper function.
5. Can I drive my 2001 Toyota Highlander with OBDII code P0122?
- It is not recommended to drive the vehicle with code P0122 as it can lead to performance issues and potential safety hazards.
6. How can I repair OBDII code P0122 in my 2001 Toyota Highlander?
- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the ECM.
7. What are some tips to prevent OBDII code P0122 in my 2001 Toyota Highlander?
- Regular maintenance, checking the throttle position sensor for wear, and addressing any engine performance issues promptly can help prevent code P0122.
8. Can I reset the OBDII code P0122 in my 2001 Toyota Highlander with a simple scan tool?
- While you can reset the code with a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.
9. How much does it typically cost to repair OBDII code P0122 in a 2001 Toyota Highlander?
- The cost of repair can vary depending on the specific cause of the code, but it may range from $100 to $300 for parts and labor.
10. Is it necessary to visit a mechanic for OBDII code P0122 in a 2001 Toyota Highlander, or can I fix it myself?
- Depending on your automotive knowledge and tools, you may be able to address the issue yourself by following repair guides or tutorials.
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