Need help please. Don't know if it's the downstream sensor ar catalystic. Thanks
Friday, March 4th, 2016 AT 10:39 AM
8 Replies
DRCRANKNWRENCH
MECHANIC
3,380 POSTS
I looked up the code in our online guide. Attached are the notes from said code. Let me know if you need more information. One of the sensors probably needs replacement.
Images (Click to make bigger)
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, March 4th, 2016 AT 11:18 AM
WRENCHTECH
MECHANIC
20,761 POSTS
I've seen this code a lot and there are just 2 things that i've ever seen set it
Bad converter 95%
Exhaust leak ahead of the converter 5%
Was this
answer
helpful?
Yes
No
Friday, March 4th, 2016 AT 3:21 PM
WROJAS0919
MEMBER
13 POSTS
Thanks for the reply!
How would I be able to tell if its a leak?
Was this
answer
helpful?
Yes
No
Friday, March 4th, 2016 AT 3:35 PM
WRENCHTECH
MECHANIC
20,761 POSTS
You put it up on a lift with the engine running and carefully feel all around until you feel the air puffing.
Was this
answer
helpful?
Yes
No
Friday, March 4th, 2016 AT 3:58 PM
WROJAS0919
MEMBER
13 POSTS
Its not a leak, the car has two catalystics how can I tell witch one it is? And it only has two sensor :/.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, July 29th, 2016 AT 3:45 PM
WRENCHTECH
MECHANIC
20,761 POSTS
P0420 applies to bank one if you have a V6. That is the only bank if you have a 4 cylinder. It will be the converter just ahead of the downstream sensor. The sensor could be right in the converter itself.
Was this
answer
helpful?
Yes
No
Friday, July 29th, 2016 AT 4:03 PM
WROJAS0919
MEMBER
13 POSTS
Thansk for your answer, so then I shouldnt think its the converter attached to the manifold?
Was this
answer
helpful?
Yes
No
Friday, July 29th, 2016 AT 6:19 PM
WRENCHTECH
MECHANIC
20,761 POSTS
The one between the 2 sensors is the one being monitored.