Had my catalytic converter replaced - now throwing SES codes

adrenalnjunky · Post by **adrenalnjunky** » Tue Aug 30, 2005 5:09 am

For the past 2 months my truck had developed a rattling from the exhaust that I finally diagnosed was coming from the converter, time and cash constraints dictated that I couldn't get it fixed right away.

Now I finally went and had it replaced by a local muffler shop ($160 installed FYI) and now I don't have to turn the truck off to place an order at a drive-thru. Accelleration is better, and it appears to be using less gas than it had been.

2 days later and I get a SES light. I haven't had a chance to have it scanned for codes yet, but anyone have any ideas?

Tonight I'm going to get under there and make sure they didn't damage or unplug the O2 sensor (If there is one down near the cat).

Other than that I dunno what it could be.

SONOMA915 · Post by **SONOMA915** » Tue Aug 30, 2005 5:18 am

It could have damaged an O2 sensor. A cat will go bad and rattle due to the introduction of raw (unburned) gas. You really wont know until you get your code. Checker auto parts will read codes for free, if you dont have a scanner.

Post by **HenryJ** » Tue Aug 30, 2005 7:17 am

I forgot to plug in the rearmost O2 sensor when I ditched my precat.
That may be your problem?

AZS10Crew · Post by **AZS10Crew** » Tue Aug 30, 2005 8:25 am

Also check to make sure your gas cap is tight and doesn't have a cracked seal. I had to replace mine a few weeks ago because it had gone bad and was throwing an SES light.

adrenalnjunky · Post by **adrenalnjunky** » Sat Sep 03, 2005 3:56 pm

well the SES went away on it's own 2 days ago before I had time to check anything.

Today's new malady - I can smell coolant coming through my climate control ducts.

Heater Core it sounds like.