P1125 Lexus Code - Throttle Control Motor Circuit Malfunction
Quick Answer
Throttle motor is operated by the ECM and it opens and closes the throttle valve. Common causes include Faulty Throttle Control Motor, Throttle Control Motor harness is open or shorted, Throttle Control Motor 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
- P1125 Lexus indicates Throttle Control Motor Circuit Malfunction.
- Common causes
- Common causes include Faulty Throttle Control Motor, Throttle Control Motor harness is open or shorted, Throttle Control Motor 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 P1125 Lexus Description
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body and it provides feedback to the ECM to control the throttle motor in order to the throttle valve opening angle properly in response to driving condition.
If this DTC is stored, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring.
However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable
What are the Possible Causes of the DTC P1125 Lexus?
- Faulty Throttle Control Motor
- Throttle Control Motor harness is open or shorted
- Throttle Control Motor circuit poor electrical connection
How to Fix the DTC P1125 Lexus?
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 P1125 Lexus 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 P1125 Lexus Code
1. What are the common symptoms of OBDII code P1125 in a Lexus related to Throttle Control Motor Circuit Malfunction?
Symptoms may include rough idling, engine stalling, lack of power, and the vehicle going into "limp mode" with reduced performance.
2. What are the potential causes of OBDII code P1125 in a Lexus?
Possible causes include a faulty throttle control motor, damaged wiring or connectors in the throttle control circuit, or issues with the throttle position sensor.
3. How can I diagnose the Throttle Control Motor Circuit Malfunction in my Lexus when experiencing code P1125?
A thorough diagnosis involving checking the throttle control motor, inspecting the wiring harness for damage, and testing the throttle position sensor using a multimeter is recommended.
4. Can a dirty throttle body or throttle plate cause OBDII code P1125 in a Lexus?
Yes, a dirty throttle body or throttle plate can disrupt the throttle control system's operation, leading to the malfunction code P1125.
5. Is it safe to continue driving my Lexus with OBDII code P1125 related to Throttle Control Motor Circuit Malfunction?
It is not recommended to drive the vehicle with this code active, as it can lead to unsafe driving conditions and potential further damage to the engine or other components.
6. How can I reset the OBDII code P1125 in my Lexus to see if it returns?
You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes. If the issue persists, further diagnosis and repair are necessary.
7. Are there any quick fixes or temporary solutions for OBDII code P1125 in a Lexus?
Quick fixes like cleaning the throttle body or checking for loose connections may provide temporary relief, but a proper diagnosis and repair are recommended for a lasting solution.
8. Can a DIY enthusiast repair OBDII code P1125 related to Throttle Control Motor Circuit Malfunction in a Lexus?
Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue. However, professional assistance is often recommended for complex electrical system problems.
9. How much does it typically cost to repair OBDII code P1125 in a Lexus at a mechanic or dealership?
Repair costs can vary depending on the specific issue causing the code, but expect to pay anywhere from $200 to $500 or more for parts and labor at a professional repair facility.
10. How can I prevent OBDII code P1125 in my Lexus related to Throttle Control Motor Circuit Malfunction in the future?
Regular maintenance, such as keeping the throttle body clean, inspecting wiring for damage, and addressing any engine performance issues promptly, can help prevent this code from reoccurring.
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