catalytic converter

2003 TOYOTA CAMRY
23,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
Avatar
CLIFF1000
  • MEMBER
  • 3 POSTS
I have a p0420 code bank1 which I assume it the (OS-1) the exhaust manifold is welded with a primary catalytic converter and a secondary under the car both temperature is different which I think is okay but both temperature is lower at the end of the catalytic then the front. I read between 700 to 600 up go down its between 400 to 300
Nov 10, 2018 at 2:37 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi and thanks for using 2CarPros.com.

The temperatures you listed do not sound out of the ordinary. If the P0420 is the only code, chances are the catalytic converter is bad. If there was an issue with an O2 sensor or the air fuel sensor, an additional code would be set.

Check to make sure there are no exhaust leaks, which can lead to this code.

Let me know if there are any other codes.

Joe
Nov 11, 2018 at 10:39 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle