SES Light???
Thread Starter
Staging Lane
Joined: Sep 2002
Posts: 58
Likes: 0
From: Middletown, CT
SES Light??? I threw a SES light the other night while just sitting at a stoplight. I had AutoZone read it & it revealed 4 codes. All of them were "Catalyst Efficiency Below Normal" (I think P0420 & P0430, or something close to that)
My car only has 13,000 miles on it. The mods are as follows: SLP Blackwing Lid, K&N Filter, SLP CNC-Ported Heads (stock cam).
Is it possible that my cats are bad already?? I'm just looking for any input/thoughts before I take it to the dealer.
TIA!
-Andy
My car only has 13,000 miles on it. The mods are as follows: SLP Blackwing Lid, K&N Filter, SLP CNC-Ported Heads (stock cam).
Is it possible that my cats are bad already?? I'm just looking for any input/thoughts before I take it to the dealer.
TIA!
-Andy
TECH Resident
Joined: Jul 2003
Posts: 834
Likes: 0
From: Marysville, OH
Re: SES Light??? i would think that maybe your rear O2 sensors are not detecting much change from the front two and that is why you received the code. I thought that the only thing monitoring the cats was the rear O2's. If the codes keep returning I would by O2 simms. They "should" always fool the PCM enough to stop codes.
