trouble code assistance

[silverbullet29]

ive got a 2000 camaro v6 and i was using my hypertech tuner and i found one trouble code which is po420 catalyst system efficiency below threshold, left bank what exactly does that mean

[BLLDOGG]

Re: trouble code assistance

Most likely need to replace the converter. anything else going on like exhaust leaks or sensor problems?

[silverbullet29]

Re: trouble code assistance

well i took out my cat. but i cleared the dtc and it comes right back after about 100 to 200 miles.

[bluovlh8er]

Re: trouble code assistance

bad wire and plug will cause a misfire code, then a po420. on my buddy's car it was cylander 1.

[BLLDOGG]

Re: trouble code assistance

well i took out my cat. but i cleared the dtc and it comes right back after about 100 to 200 miles.

Not having your converter in their will cause that code....Sure of it

bad wire and plug will cause a misfire code, then a po420. on my buddy's car it was cylander 1.

thats not a misfire code buddy. Thats a converter code.

[silverbullet29]

Re: trouble code assistance

by the way thats a sweet *** camaro you got