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Sudden increase in RPMs?

Tiny
BLESSING EWOBOR
  • MEMBER
  • 2010 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 210,535 MILES
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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Wednesday, August 2nd, 2023 AT 9:07 AM

8 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,843 POSTS
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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Thursday, August 3rd, 2023 AT 10:42 AM
Tiny
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  • 666 POSTS
Thank you.
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Thursday, August 3rd, 2023 AT 12:37 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,843 POSTS
Use 2CarPros anytime, we are here to help. Please tell a friend.
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Friday, August 4th, 2023 AT 10:16 AM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 666 POSTS
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.
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Saturday, August 5th, 2023 AT 12:33 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,843 POSTS
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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Saturday, August 5th, 2023 AT 10:34 AM
Tiny
BLESSING EWOBOR
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  • 666 POSTS
Thank you very much.
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Sunday, August 6th, 2023 AT 11:34 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,843 POSTS
Use 2CarPros anytime, we are here to help.
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Monday, August 7th, 2023 AT 10:30 AM

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