Lexus is 500 LE engine shutoff randomly
 

As the title suggests. Today morning I was driving toy kids preschool. The engine suddenly shut down at a stop sign with a warning about "charging malfunction". When I got home I saw that the engine was idling erratically between 500-1000 rpm. I did an ECU reset by pulling the negative terminal on the battery and letting any residual power drain for 30 minutes. When I restarted the car it was idling erratically again but after ten minutes it became stable at about 700 rpm. I figured maybe the car was in "learning mode"? I test drove it and had no issues. I went to a coffee shop in the evening but on the way there the engine died again. This time I got a "engine malfunction" error. It's at the dealer being looked at. They said it could be due to bad fuel but I doubt it because I have less then half a tank from last time I filled up. I would expected problems a lot earlier but I could be wrong.

The codes I saw were something like:
- engine bank 1 and 2 too lean

I'm having some buyers remorse over this car. I broke my cardinal rule of not buying a newly released model the first year.

I've also had the CEL problem and the front deiver-side apron separation. Such a shame this is coming from Lexus, a company known for reliability. If I knew I could have these issues I would have bought an Audi rs3 at least your getting a much more exciting and car. I bought this car for reliability....bummer.

Feels like the fuel pump... :(

How many miles?

Another lame bad fuel excuse from the dealer. I hope you cleared out the mini fridge at the dealership at least. Scumbags.

That sucks man, but part of reliability is the understanding that they'll take care of it without interrupting your life.

Hopefully, you were given a loaner until they can determine the cause.

Agreed.

Keep us informed @lexussingh and good luck! If it’s the fuel pump then I’m thinking I’ll be proactive and have my dealer replace mine. The thought of being stranded anywhere, let alone up in the mountains, makes me physically ill. (At almost 18k miles…)

I am leaning this way too. This really sucks, sorry OP.

Hopefully she's back up and running better than new soon!

It's really sad to see how Lexus is going down like this. Checked ES subforum they got a Fuel seepage notification until 2022 model year and then in the RX subforum they have many issues related to Engine (not surprising given how the Tundra is plagued with issues due to massive powertrain changes) and the Dash coming off first model year but those problems are a bit too much.

People buy Lexus for a massively superior experience over the modern automobiles with a ton of issues and long term issues plus the lease mobiles becoming money pits due to inferior engineering, shortcuts and planned obsolescence. And Lexus being opposite are failing at it, I can only express my massive disappointment, look at Lexus LS the car which made the brand it got just abandoned for good. Also a small note, YTer Samcarlegion who based IS 500 he also got the 2022 IS 500 with issues sitting in the dealership. Lexus need to get their things correct esp with such a good engine 2UR GSE and it has been there since IS F, yea it is changed but still Common Lexus this is a 65-70K vehicle....that too you make these IS 500s at Tahara which builds the legendary 4Runner and built some solid cars.. Takumi craftmanship and all that.

With these kind of issues popping up related to fuel pumps, no wonder why old Land Cruiser and the good ol GX with no D4S system just big NA V8 1UR series with Port injection only just simply run forever. Add the 4Runner to the lineup. As much as advanced as it sounds and props to Toyota Motor Corp for making the D4S unlike the carbon plagued GDI engines of the world this is a complicated system without a doubt.

To the OP, hope he gets the IS 500 repaired properly, Good Luck.
Also just in case make sure you check out the Lemon laws in your State if the car is constantly getting into the dealership under 24 months.

Let's not overreact. 2023 IS 500 owners are not having these issues. This was an issue with earlier examples. I drive the absolute crap out of mine and haven't seen any issues of any kind in over 5,000 miles. These cars are fundamentally rock-solid; what we are seeing with the early cars is defective parts, simply put. As dealers get more and more aware of these trends, they will be more accommodating. Don't be afraid to pull up Club Lexus on your phone and show them that you're not the only one seeing this.

Correct, I haven't heard any issues with 2023's as of yet, it's sadly only been 22's.

And let's not underreact either. You simply dont have enough miles on your 2023. Show me the hard evidence that Lexus actually switched fuel pump suppliers to fix the issue. Didn't think so.

Don't forget the 2023s have the problem of apron separation too. Forsythe said they were working on it. Forsythe is nothing but lies, an "influencer."

Also service dept saying you have bad fuel sounds like an easy cop out ordered from Akio himself. It's bad enough to have a s****y car, but if the techs can't even admit to the fault then Lexus is going down.

You brought up Forsythe, not anyone else in this thread. Maybe we should make you a soap box thread if you want to hijack every thread to rant about whatever you want. Please exit.

edit: Just to be clear - A) I don't like the tone of how you responded to me, and B) we are trying to help OP with their issue. What you are doing with your post is not helpful.

I wonder if it is early 2022s? Or a bad batch of specific VINs? I my car came in January of 2022 and it has been solid so far. I have one squeaky dash panel I need to find and that's it, zero issues. My favorite part right now, even more than the V8, is an ice cold AC when it's 100-frickin-8 degrees outside (like today).

Also, Toyota did change suppliers when all the supply chain/COVID crap was happening. Maybe they still don't have a reliable supplier yet? Just guessing at this point, hopefully the dealer comes through on this one. With an.... age advanced... clientele, sometimes the simplest solution is the right one. Not in this case,but sometimes 😝

I think it's a crapshoot.

And we can't say that it's a widespread issue either. There's what, like 5-7 known fuel pump cases now? Still a low percentage, and RC-F have the same issue, so there's something wrong with couple pumps, but doesn't mean they're all gonna fail.

Anyway,. still sucks when it happens

About 12,000 miles