99LSGUN

hey guys whats up?

i recently just got my paceseter LT's, SLP Loudmouth and ORY pipe put in and everything was cool and today i was coing home from work and all of a sudden my " Service Engine Soon" light came on. after i was done flipping out i couldnt understand why it came on if you have any clue let me know thanks.

Starz T/A 17

iTrader: (6)

Take it to either advanced auto or autozone and get them to read the code for you they will do it for free. Did you hook the emmisions crap back on and put sims in the back?

J E T

iTrader: (5)

You need to either purchase o2 sims (about $90) or have a tuner delete your rear o2's.

99LSGUN

the shop put o2 sims in the rear. and i drove it again later today and the light was on then went off i dont understand at all let me know if you have heard off this or anything would help thanks for the previous info.

Lithium

iTrader: (47)

Its the front o2's acting up most likely. Get it scanned at autozone to be sure. Mine came on and off as well...get some bosch 13111's if it keeps bugging you.

Starz T/A 17

iTrader: (6)

yeah probally a P1153 Im having that problem after I put my headers on

01RedT/A

if you need a set of working o2 sims, pm me. ive got a good set i can sell you.

99LSGUN

is it a big deal? like will the light effect my performance? witht he sims acting up? or should i not worry about it till inspection time?

2K2WS6TA

iTrader: (2)

The rear o2s are just for emissions they shouldn't affect the performance, but with the light going on and off, I'd be betting it's the front o2s (and they can affect performance) like Lithium said, get some bosch 13111s if the light keeps appearing.
One question for you, was today colder than it has been since you put the exhaust on?

777

iTrader: (21)

Could be that the 02 sensor's aren't heating up quick enough. I had that problem, so do a few others that have long tubes. I'd be willing to bet that that's the problem, especially since it is intermittent.

99LSGUN

yea when i put the headers on the weather was like 55-60 degrees and yesterday it dropped to like 30 degrees so yesterday was the first cold day since the headers were on. let me know what this means or what it could be thanks.

777

iTrader: (21)

All it does is that if the 02 sensors don't heat up within a certain amount of time it throws a code. It just means you have to wait a little longer before the 02 sensors start to read correctly. Doesn't hurt anything, unless you are one of those people that crank the car up and go wot out of the driveway. They should be heated by 1.5 minutes or so.

99LSGUN

ok cool but will the code come back on again like when it starts getting nice out like 50- 60 again and when it comes summer time like 90's will the light still come back on?

777

iTrader: (21)

It's possible, if that's the problem, but I'm not positive. Disconect your battery for like 5 minutes and see what happens. Typically, if codes come on and off they aren't a problem and usually are due to the 02 sensors.

2K2WS6TA

iTrader: (2)

Just a theory, it seems when you have headers, if the weather turns cold, the o2s start acting up more, the headers retain less heat then the cast iron manifolds, and it causes the o2s to get too cool to function correctly, but as the weather warms up the o2s problems seem to become less frequent

'Trust'

iTrader: (24)

I'm with 777 on this one, if he is right it happens because your o2's arent up in the engine bay anymore so they arent getting the heat from the motor to aid in warming up. If thats the case after a few resets of the PCM the computer will log the code in history and the SES light wont come back on for that code. Get it scanned to be sure though.

99LSGUN

i got it scanned last night and the code if i remember right was p1704 i def. know those numbers were in the code. and how do you reset the PCM?