[tgman7]

I was driving my wife’s 1st gen Highlander yesterday, cruise control worked fine. Then today, on our drive home, I was unable to use cruise control. When I would click the button to turn it on, the green ‘Cruise Control’ dash light came on, but when I clicked down to set my speed, it didn’t do anything.

Brake lights work and no blown fuses. Hoping someone here can help out!

 

[C R]

May be brake switch adjustment. Pull up on the pedal and try to engage. Is the check engine light on?

 

[tgman7]

I’ll have to try pulling on the pedal. The check engine light is on—the code is for the downstream o2 sensor.

 

[C R]

Was the cruise working with the CEL on? I have noticed that Toyota likes to turn off things to annoy the driver when the ECM detects a problem.

 

[underthehood51]

Pretty sure a MIL code will disable cruise

 

[C R]

Try clearing the code and see if the cruise works. Also, even if you had a code before that did not interrupt the cruise, you may have a new one that does. You may need to re-check.

 

[tgman7]

you were spot on—the CEL went off and cruise works now. P0136 code has been on and off for a little bit. Time to change the post-cat sensor.

 

[C R]

I would check the wiring first, especially if you live in corrosion country.
Track record of cheap aftermarket sensors is not good. Use Denso if you plan to keep the car.

 

[tgman7]

Definitely going with Denso. I’ve heard anything other than Denso is no good.