my check engine light has been on for a while and i thought it was due to having a different muffler on it but i plugged it up and showed 5 codes. they were 449,440,410,410,440. i dont know where to figure out what these mean, anybody happen to know wht they mean? i figure one of them is something w/ o2 censer but no clue on the rest
*edit* i found a site that showed alot of the codes but only helped me on the 449= vacum leak, 440= N/A, and didnt even list 410.

 

I found these@ obdII.com
P0410 = Secondary Air Injection System
P0440 = Evaporative Emission Control System
P0449 = EVAP Canister Vent Solenoid Valve Control Circuit

 

ok thanks i understand the 440 but the other t im not sure what they mean, can anybody explain them to me. im not good w. this tech stuff. and maaybe what it needs to fix it

 

Looks like the PCM is pointing towards the EVAP vent solenoid which is located near the back of the fuel tank and should be located behind a sheild near the driver's side frame rail, IIRC.

The AIR code (P0410) means something is wrong with the AIR pump that, on a 4wd is located under the radiator towards the passenger side frame rail. I think it is in the same location on a 2wd. Anyway, it is possible for condensation to get into the pump and corrode things. The pump can be disassembled, cleaned and lubricated if it isn't too bad.

The AIR (air injection reaction) system was thought to extend the life of the catalytic converter as well as allow it to operate more efficiently. It really didn't do a good job of either. If you are in the market for a PCM tune, many tuner shops can eliminate the code for the AIR system allowing you to remove it. Many have done this with no consequences when undergoing emissions testing at the tail pipe, even further reinforcing the fact that the AIR system really doesn't work as advertised. Kinda makes me wonder why my '04 Rainier still has the darn thing.

 

thatnks swartlkk, are these issues i need to adress promptly? i dont kow the importance of these parts

 

The sooner you pop apart the AIR pump the less damage will be done. It is still possible that you would need to replace the AIR pump, but you may be able to save it.

The vent solenoid won't impact performance and can be overlooked for a bit. The part isn't that expensive and is quite easy to change.

 

ok cool after the holiday are over and i can bounce back fromit, i will look in to fixing them. thanks