SoCalGS

1st post! Lets GO! Ok...I have a 2003 GS and it rolls like a charm. Bought it used with 82000 on a Thursday and drove it from LA, CA to San Diego, CA on Saturday. Made a full fledge trip. About 100 miles in, I get the check engine light at the same time as the vsc vcs off lights. I went through the threads and got some info saying to check the code so I did just that. I got a p0430 and p0430 pending. Researched the codes and found out it was most likely o2 sensor on bank 2 or exhaust leak. I reset the codes so that I could drive home (without changing out the sensor). Car still drove great and I made it safe. Fast forward to Wednesday, I was driving around town on a 75+ degree day with the air on blast and viola! The lights came on again. This time I got a p0171 and p0174 code but no p0430 at all.

Car seems a little weak when taking off sometimes, a/c bounces up and down to rhythm of acceleration, lights went back off on their own power and have not come back. I just changed out the battery because I had three different diagnostics tell me it was weak. Car has noticeable change in power but still doesn't seem to have all its go. Please give whatever advice you can give. Thanks a million

bigblack06

iTrader: (20)

Sad to say this but your first post was in the wrong section.

SoCalGS

Thanks anyway! Im going to move it over right away...

joeker

iTrader: (8)

I know it's the wrong section, but maybe a moderator can merge this to the OP's new thread: it looks to be your spark plugs. Your description is consistent with what happened to my 2GS