Check Engine Light

[lepa101]

I have cold air intake and header with cat back exhaust. Wondering if that might have anything to do with it. All fluids are good. I just bought car yesterday and everything seems to be fine.

[navylife59]

header cause you got rid of the primary cat. You will have to use the 2 anti-fouler trick on the bank1/sensor2 O2 narrow band on the s-pipe. Don't forget to reset the ECM afterwards.

[lepa101]

I don't really understand the You will have to use the 2 anti-fouler trick on the bank1/sensor2 O2 narrow band on the s-pipe. Don't forget to reset the ECM afterwards.
thing you mean can you elaborate a little more sorry I just not really familiar with that. Is it something major on the car.

[navylife59]

The 2AZ-FE ECM for the tC has a factory wideband bank1/sensor1 on the oem header w/ cat that measures the A/F ratio. Just before the secondary cat on the s-pipe is a factory narrowband O2 bank1/sensor2 that measures the efficiency of the emissions system so the ECM can fine tune things for MPG and a clean burn. If we had a v6 or v8 you would see bank1/sensor1 and bank2/sensor1, etc. Inline engines only have 1 bank of cylinders.

The anti-fouler trick is already well documented around the forums works most of the time. It pulls the O2 sensor out of the exhaust gas stream to fool the ECM into thinking that the primary cat is there and working for aftermarket headers. Have your car's OBDII/CAN system scanned for the exact codes. It might be something different.

[lepa101]

So I will go to the scion dealer and have it hooked up to the computer and then have them do that sensor thing then right.

[ForBiddeN]

if u do that they may void out your warrenty watch what you do there is a guy on the forums told the dealer what he had and they voided his warrenty. go to a parts store like autozone or adv auto parts they have an obd computer that will tell u whats wrong.

[peruano85]

or just disconnect the battery for about half an hour and it will reset the ECM

[navylife59]

5 mins should do it. It will take some driving around to let the ECM relearn. No big prob, it will just take 20-50 miles to recalibrate to the best performance.

[lepa101]

Yea I'm just putting the stock exhaust all back on, if anyone has the stock exhaust manifold be interested in purchasing it.

[ForBiddeN]

sell me your headers and ill make a trade

[lepa101]

alright sounds good to me. What year is your scion, I have a 06.

[ForBiddeN]

it doesnt matter what year it will bolt on only diffrence in the 07's are some of the electrical work. but 07 lol.