hi guys ,
i had a question ....
i have a check engine light on and when i put my DriveRight Car Chip in the car it tell me the Code PO420 and thats (CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD) can some one tell me if this is a major problem with the car ? or how can i get it fixed ? and also how does this happnes ..... is it cost lot of money to fix it .. so guys if u can help me out here with the info that would be great.

thanx guys

 

First question would be, do you have an aftermarket downpipe?

 

What is a drive rite chip? That's probably your first mistake.

 

+1 for the above comments

 

hahah +1

 

Its a low buck Scan tool specific to a manuf.

Code 420 per Shopkey:
Corrected for Impreza 2.5 RS 2002

 

ya i think i dooo

 

Buy something like this...

http://cgi.ebay.com/ebaymotors/WRX-0...spagenameZWDVW

and screw it inbetween your rear 02 sensor and your downpipe.

 

Do you drive a WRX or a Impreza 2.5 RS?

 

2002 Impreza 2.5 RS

 

corrected my above post - this is asuming it is pretty close to stock.

 

do you have a cat or has it been removed?
if its removed you need the CEL fix as stated above from vibeeleven
if not just go back to stock and get a real tune

 

+1, and get it from a ---> reputable <--- shop as well. someone with a lot of experience

 

if your car is stock, take it to a dealer. the emissions system is covered for like 8 years