mkwon3

2003 Lexus GS 300 with 75k miles. I got the check engine light at the same time as the vsc and vsc off lights. Still able to drive with full power. Pep Boys told me the code read P0171. After unplugging the terminal from the battery and pluggin it back, all 3 lights are gone, but the car has less power now. When I drive it, it doesn't have full power. Can anyone help please? Thank you very much.

Clear2Cloz

did you disconnect the battery right after they scanned it? i'm assuming pep boys cleared the code, therefore it has nothing to do with the battery being disconnected. the lights will come back on after a drive cycle

sakataj

iTrader: (182)

ok here is your freebie.....

take the P0171 code and go to the advanced search, narrow it down to the 2nd gen gs section and go from there. you will have to do some reading.

i will get you started on a few i skimmed i think have the best info on them

https://www.clublexus.com/forums/per...1-threads.html
https://www.clublexus.com/forums/gs-...-diagnose.html

but please search and read next time BEFORE making posts. btw you got off easy sir

77i9

iTrader: (14)

is that the new kindler and gentler Brian? lol

Clear2Cloz

i saw that coming from a mile away

mkwon3

took it to pepboys and they told me I had a clogged catalyct convertor, they will order the part on Monday. I drove it home on sunday since the parts store was closed. The car had full power and acceleration was good. Why is it good now? Do I still have to order the part and fix it?

SC400slide

iTrader: (11)

If he was a moderator... JK

I'd advise you replace the Cats anyways. Weird that it isn't boggy now... GL.

sakataj

iTrader: (182)

lol, maybe gill,maybe....im fixing to leave you'll after paint so maybe i wanna leave on a good note

hahaha, no one saw that coming.....that was my alter ego who was being nice

doubtful its the cats but if you wanna spend that kind of money to find out by all means go for it. did you even read any of those links?

i wanted to be a moderator in the classified's where i live,from what i heard, i was actually nominated by a few moderators on the last round of voting but i was turned down. i don't think they would ever let me be one but its we ya know

mkwon3

I read the links you have provided and more...now my eyes hurt. =) Thanks for all the help. Car drives well. In the meantime, I will continue to drive it daily and see what happens. I decided not to change the CAT for now. GREATLY APPRECIATED!!!

GS4_Fiend

iTrader: (22)

A clogged CAT can not cause a lean condition. Since it's only one bank, check for vaccum leaks or a bad a/f sensor.