Sudden increase in RPMs?

2010 TOYOTA COROLLA
210,535 MILES • 4 CYL • 2WD • AUTOMATIC
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BLESSING EWOBOR
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Hello, the vehicle engine speed do increase suddenly to like 3,000rpm at startup and reduces after a while, the fuel injector and mass airflow has been cleaned. When the vehicle was scanned the code were on Oxygen sensor but the oxygen has been replaced and the codes are still available. What could be done?
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Aug 2, 2023 at 9:07 AM
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STRAILER
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The VSS sensor will cause this issue. Here is the location for the sensor so you can change it out and clear the codes. Check out the images (below). Please let us know what happens.
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Aug 3, 2023 at 10:42 AM
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BLESSING EWOBOR
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Thank you.
Aug 3, 2023 at 12:37 PM
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STRAILER
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Use 2CarPros anytime, we are here to help. Please tell a friend.
Aug 4, 2023 at 10:16 AM
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BLESSING EWOBOR
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Good morning, sir,
I have already informed most of my friends about 2CarPros.
Thank you for your concern. I have checked the sensor; it is in good condition. When the vehicle was scanned it was bringing codes on C0200 and C0205, the vehicle was test drive, scanner was connected to it to monitor the speed of the wheel. The rear wheels were reading but the front none of them were reading.
The two front wheel speed sensor has been replaced but it is still not working. I measured the voltage on the two sensors line. They were at zero volts with the ignition turned off and 12 volts with ignition turned on.
I was thinking is the module but what other tests could be carried out?
And is there any circuit diagram for the abs system?
The vehicle speedometer is not functioning while the vehicle is moving.

Thank you.
Aug 5, 2023 at 12:33 AM
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STRAILER
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Here are the ABS wiring diagrams so you can check the connections between the wheel speed sensor and the PCM and ABS module. This guide can help:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know what happens.
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Professional Diagram for 2CarPros Members
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Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
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Aug 5, 2023 at 10:34 AM
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BLESSING EWOBOR
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Thank you very much.
Aug 6, 2023 at 11:34 AM
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STRAILER
  • ✓ASE Certified Mechanic
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Use 2CarPros anytime, we are here to help.
Aug 7, 2023 at 10:30 AM
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