p 0420

[bird of fire]

Iam getting a p0420 would that mean I need a new cat?

[David8399]

Re: p 0420

yes it does

[whitdog54]

Re: p 0420

replace with 3" carsound

[EarlR]

Re: p 0420

Couldn't that also mean a bad O2 sensor?

[Joey41]

Re: p 0420

When I had that code replacing the cat fixed the problem. As far as I know the o2 sensors have there own codes for each.

[Bonemaro]

Re: p 0420

That's the code I was getting to. I popped a SIM on instead, now I'm getting a P0138 code. Need to figure out why the SIM is putting out > 999mV.

Getting tired of seeing this...

[flamingchicken]

Re: p 0420

When I had that code replacing the cat fixed the problem. As far as I know the o2 sensors have there own codes for each.

the cat doesnt have a code by itself...the post cat o2 sensor tells you when the cat is bad, or it itself is bad. and if you use a genesys then itll tell you if its bank one (precat) or bank two(post)