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Tiny
DGOLDENBERG1213
  • MEMBER
  • 2006 DODGE TRUCK
  • 98,000 MILES
06 Dodge Power Wagon, 2500 4x4. 5.7 Hemi

New Down Stream 02"s

2 New OB2 Cats;

Computer Re-Flashed

Can not shake the Engine Light/Bad Cat Bank #1 code.

What is going on?

Thank You All
Dave, G.
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Friday, September 23rd, 2011 AT 9:16 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Dave:

Check wiring to the O2 sensors. Also, check sensors with a live scanner to see if it is operating properly (within spec).
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Friday, September 23rd, 2011 AT 9:26 PM
Tiny
DGOLDENBERG1213
  • MEMBER
  • 17 POSTS
Did that, o2"s check ok and were just replaced 48 hr ago.
The light came back after about 100 mi of driving. Cats replaced twice on the off chance they were bad from the shelf.
What side is Bank 1 driver or passenger? I'm thinking I might have an exhaust leak somewhere. Would a leak on either bank throw the code?
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Friday, September 23rd, 2011 AT 9:37 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If I can add, if you did not use an oem converter from the dealer, you will replace cats all day long and the light will come back on. There is not enough precious metals in the aftermarkets to keep the light out. Thats why it is 600-800 for factory and 250-300 for aftermarket.

Roy
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Friday, September 23rd, 2011 AT 9:53 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
An exhause leak usually won't, but it has happened. Bank one is the driver's side.
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Friday, September 23rd, 2011 AT 9:54 PM
Tiny
DGOLDENBERG1213
  • MEMBER
  • 17 POSTS
Thanks that makes sense, but that being the case I think I'll disconnect the light and change my address to a non-smog county.
1200-1600 is out of the question. And or I'll use some 02 simulators and bypass them all together. Thanks anyway.
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Friday, September 23rd, 2011 AT 10:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Wish I could have helped more. I, like you, live in an area with emissions. Six miles away, it doesn't exist. Needless to say, it frustrates me.
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Friday, September 23rd, 2011 AT 10:03 PM
Tiny
DGOLDENBERG1213
  • MEMBER
  • 17 POSTS
Hey I just thought of something.
What if I were to pull the down stream o2"s and just wire them up out of the way.
They would still be connected, Just pulled out of the main stream. Wouldn't this have the same effect as a simulator?
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Friday, September 23rd, 2011 AT 10:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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No, it would set a code right away and the engine would go into what is called a closed loop. The computer wouldn't know how rich or lean to run the fuel mixture. As a result, it goes into a rich mixture.
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Saturday, September 24th, 2011 AT 2:08 AM

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