DorianB

I have a 2000 RX with 21500 miles on it.
I got the p1150 code and replaced the A/F sensor with a Denso part.
6 months later, the code came back, so thinking I could have gotten a bad part I replaced it again with another Denso part. I'm still getting an intermittent code that comes and goes.
I started down the diagnostic path with the Lexus Repair Manual and the sensor tested fine. The next pathway after checking for the oil pressure leaking is fuel pressure.

I have noticed in the last few months that when I accelerate, the car is very subtly jerky. The acceleration is not smooth. That seems to fit for a possible fuel pressure problem and I have been feeling that for awhile but not sure what it was. I have had the coils go out here and there and it almost feels like the engine is misfiring, but I know it isn't.

What should I look at first?

Fuel Filter?
Cleaning Injectors?
Fuel pump?

Where would you recommend I start? How can I test or verify the fuel pressure?

Everything else on the car works. And maintenance is up to date for the mileage it has.

I appreciate your help!

Thanks!

Dorian

maxSteel

"21500 miles"? Wow that's low.

"I have noticed in the last few months that when I accelerate, the car is very subtly jerky."

Consider the VVT solenoids. You can try just cleaning the screens.
https://www.clublexus.com/forums/rx-...o-codes-2.html
https://www.clublexus.com/forums/rx-...ement-diy.html

DorianB

"I have noticed in the last few months that when I accelerate, the car is very subtly jerky."

HAHA! You're right!

215,000 miles.

Thanks for the correction!

Dorian

DorianB

Consider the VVT solenoids. You can try just cleaning the screens.
https://www.clublexus.com/forums/rx-...o-codes-2.html
https://www.clublexus.com/forums/rx-...ement-diy.html[/QUOTE]

Thanks for the suggestion MaxSteel. That seems to have smoothed things out!