P1633 Toyota Code - Engine Control Module Malfunction Electric Throttle Control System Circuit
Quick Answer
Electric Throttle Control System (ETCS) is composed of the throttle motor to operate the throttle valve, the electromagnetic clutch to connect the throttle motor with the throttle valve, the throttle position sensor to detect the opening angle of the throttle valve, the accelerator pedal position sensor to detect the accelerator pedal position, the Engine Control Module (ECM) to control the ETCS and the one valve type throttle body. Common causes include Fualty Engine Control Module (ECM), Faulty Electronic Throttle Control System (ETCS) Actuator, Electronic Throttle Control System (ETCS) Actuator harness is open or shorted. 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
- P1633 Toyota indicates Engine Control Module Malfunction Electric Throttle Control System Circuit.
- Common causes
- Common causes include Fualty Engine Control Module (ECM), Faulty Electronic Throttle Control System (ETCS) Actuator, Electronic Throttle Control System (ETCS) Actuator harness is open or shorted.
- 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 P1633 Toyota Description
The ECM controls the throttle motor to make the throttle valve opening angle properly in response driving condition.
The throttle position sensor which is mounted on the throttle body detects the opening angle of the throttle valve, and it provides feedback to the ECM to control the throttle motor.
If the ETCS has a malfunction, 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 P1633 Toyota?
- Fualty Engine Control Module (ECM)
- Faulty Electronic Throttle Control System (ETCS) Actuator
- Electronic Throttle Control System (ETCS) Actuator harness is open or shorted
- Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection
How to Fix the DTC P1633 Toyota?
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 P1633 Toyota 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 P1633 Toyota Code
1. What are the common symptoms of OBDII code P1633 in a Toyota?
The common symptoms include engine stalling, hesitation during acceleration, rough idling, and a noticeable decrease in engine performance.
2. What can cause the OBDII code P1633 to trigger in a Toyota?
This code is typically triggered by a malfunction in the electric throttle control system circuit or issues with the engine control module (ECM).
3. How serious is the Engine Control Module Malfunction Electric Throttle Control System Circuit issue indicated by code P1633?
This issue should be addressed promptly as it can lead to unsafe driving conditions and potential damage to other components of the vehicle.
4. How can I diagnose the cause of OBDII code P1633 in my Toyota?
Diagnosing this code usually involves using a diagnostic scanner to retrieve the specific fault codes, checking the wiring and connections in the electric throttle control system, and testing the ECM for proper function.
5. Can I continue to drive my Toyota with OBDII code P1633 present?
It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.
6. What are some repair tips for fixing OBDII code P1633 in a Toyota?
Repair tips may include checking and repairing any damaged wiring or connections in the electric throttle control system, testing and possibly replacing the ECM, and clearing the fault codes with a diagnostic scanner.
7. Can a DIY enthusiast fix the Engine Control Module Malfunction Electric Throttle Control System Circuit issue indicated by code P1633?
While some basic troubleshooting steps can be done by a DIY enthusiast, diagnosing and repairing this issue may require specialized tools and expertise, so it is recommended to consult a professional mechanic.
8. Is it expensive to repair OBDII code P1633 in a Toyota?
The cost of repairing this code can vary depending on the underlying issue causing the code, so it is advisable to get a thorough diagnosis from a qualified mechanic to determine the exact repair cost.
9. How can I prevent OBDII code P1633 from occurring in my Toyota in the future?
Regular maintenance and inspections of the electric throttle control system, as well as keeping the ECM in good condition, can help prevent this code from occurring in the future.
10. Can resetting the ECM clear the OBDII code P1633 in a Toyota?
Resetting the ECM may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring.
Discuss the causes and fixes for P1633 Toyota OBDII Code
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how do l repair fault code P1633? The vehicle is not accelerating. What sensor should l replace?
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Hello.My car starts only when i use the primerpump.There are no air leaks and it give me the faultcode p1633.I'm out of ideas.
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Unfortunately I don't have the service manual or any information for the 2002 Toyota Voxy, but the code should be the same. You could start by cleaning the Throttle Body.
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I already did..I've cleaned it with injector cleaner and also I chanced it with another throttle body but the same problem.When the car is cold it starts fine.When I switch off and start again,my car won't rev up past 2000 rpm...
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Also the check engine and VSC lights are on...When it's off the engine runs fine.When it's on,it can't even rev up over 2000 rpm
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Hey Romano...have you fixed your problem? Got a toyota Noah/Voxy doing the same thing
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