It's been a while since I posted on here since I sold my SC430. We just picked up a 2022 RX F Sport. My wife and I were heading to an appointment for our new baby. We entered a parking garage and were about to grab the parking ticket from the parking ticket machine (foot was on the brake) when the vehicle started to accelerate on it's own. It kept revving and wanting to go inching forward. I kept pushing the brake and the vehicle kept going forward pushing the bar that goes up and down after you take the parking ticket and almost broke it off. I put the vehicle in park and turned off the engine. I started it back up and parked it. Called Lexus and waiting for a diagnostic test on it. Has anyone had this problem before? If my wife were driving, I think she would have panicked and crashed the vehicle.

 

My first thought was a malfunctioning Throttle Position Sensor. Ive experienced that before in another vehicle. Do you have any trouble codes/ dash lights? Regardless a trip to your dealer should get it properly diagnosed and fixed.

 

Yikes that’s scary. Glad it was a mild case but I’m Very interested to see how this goes .

 

I hope they find out the root cause. In the mean time, please do not try to do anything.

Side notes:
Did the engine redline when you shifted to "N"/"P"? If the engine was revving up in gear, it would max-out in "N" or "P".
If you are still in paper plates, is there an option for you to return the vehicle.

Salim

 

Absolutely no lights or any trouble codes. It's like nothing happened.

 

Hi Salim,

Yes the car still has paper plates. I didn't get a chance to look at the gauges since everything happened so quick.

 

If they can't fix it, INSIST they take the vehicle back.
Sounds like the old "unintended acceleration" thing.

 

There was another poster that had a fender bender while she had her foot on the brake. Car moved forward at a stop light.
My wife was backing up in the garage and the car did not stop with her foot on the brake and the sencers stopped it before she hit the wall. was thinking if it happens again i will sell it. Been over a year and it has not happened again

 

Just a random guess.

I am assuming the idle was high and while you had reached to get the ticket, your foot was not 100% firm on the brake pedal?

Also, was your right foot away from the gas pedal?

 

I have had a similar thing happen when I had my foot on the brake, but unknowingly I also had the tip of my shoe on the accelerator. I moved my foot just a little to the left and the problem went away.

 

My friend has a 2009 Camry and the same thing has happened 2 times a year for the last 6 or 7 years. I just assumed because it had very high miles the throttle body needed cleaning. Usually happened at a red light. Luckily no crashes. It would be interesting to learn if it is software or mechanical problem.

 

"...interesting to learn if it is software or mechanical problem."

The human factor should not be ignored.

 

So, he stepped hard down on the gas peddle with his foot on the brake. Only on this car but not on the other 8 cars he has owned. You are correct that the human factor is always there but it is just a bit of a stretch in this case.
We don't have clutches in most cars now. The right foot operates the gas peddle and the brake. Very difficult to put your foot on the gas and the brake at the same time.

 

Really not difficult at all. I brake with my left foot. Yeah I know bad habit but been doing for more years than you'd know and never an issue.

 

Me too, mike.