Road Rage

Note the inclusion of newer model years. And production VIN changes.
Only the first two pages provided since the rest is repair procedure. Don't go into the dealership barking orders. Just mention that you "think" your car is suffering from this condition and that you would like it checked. Certain conditions have to be met with the vehicle so plan on leaving it with the dealer for the day if possible. It has to be driven with the scan tool connected and recording live data. So this is NOT something you want to drop-in unannounced for.

jlawr

As you can see on page 6 of the pdf, you can tell what version of the ECU firmware upgrade you have on the tag in the lower right of the hood. If you've had the valve gaskets replaced, you may not need this TSiB.
If your engine has never been worked on or you've never updated the ECU firmware, this might be a good idea.
Under warranty till at least 72k miles.

MrExecutiv

iTrader: (2)

Thanks for the info

DrQuality

I will discuss my own experience regarding this issue in a separate post. But first I wanted to make my ClubLexus colleagues aware that

L-SB-0033-08 "Hesitation on Acceleration" [2008-06-06, revised 2008-12-23 & 2012-07-18]

has been OBSOLETED & SUPERSEDED by

L-SB-0122-17 "Hesitation on Acceleration and-or P2119" [2017-05-03].

I did not discover this fact either in this forum or at the NHTSA website. Rather, when I presented L-SB-0033-08 to my dealership, they eventually provided in return a copy of the superseding L-SB-0122-17.

The major differences between the two SBs, as I read them, are:

* In the 2008 SB, the repair procedure calls for first performing the ECM flash … then conditionally (ie, if the hesitation is not resolved) performing the cylinder head replacements. The SB does not specify a cause.

* In the 2017 SB, the repair procedure calls for first performing the ECM flash (at steps 2 & 3) … and then, unconditionally, performing the cylinder head replacements (at step 4). The SB specifies the cause as "inappropriate spark knock or detonation detection."

This 'inappropriate detection' phenomenon is described with further clarity & detail at https://bit.ly/3ClAjBf .

jdanielca

So head gasket right? there’s a failure and hesitation due to compression issues……a leak is causing the hesitation … hah what’s shocking nothing…. Same leak probably caused my engine failure

Striker223

I'm honestly glad I went with an A8 instead of a 460 after all these recent findings, I would have compulsively done head gaskets if I knew there is this much chance for issues if I did decide to stay with Lexus lol!

Anfanger

You might be onto something. I believe, what caused failure of your engine is following. Due to oil consumption, the oil level was not optimal for the RPM you used. When you started bringing the engine to high RPM, it forced the oil pump move majority of oil in the upper part of the engine. It caused oil starvation at the bottom result of which can be seen on the failed crankshaft.

jdanielca

meaning a bad seal, contributed to the lack of pressure is that right?

Anfanger

If you mean a bad oil seal caused excessive consumption than yes. It is my understanding of what happened.

jdanielca

the tsb is for head gasket right? Or am I confused ? Haha so I’m talking about head gasket issues resulting in loss of pressure