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Discussion Starter #1
I have had this pop up twice now when under heavy acceleration. I clear the code and it stays away for a while.

I have a full custom SS Bam exhaust with cats (4) from the stock manifolds back.
The O2 sensors are stock and original with 100,000 miles on them.

I don’t know if it’s the sensors or a bad cat, but I guess it could be either. Maybe both?

I have techstream software and can run tests, but I don’t know what I’m looking for. I do know that if I run the PID app on my phone, both banks do not match. At all.

Any help would be appreciated. The cats are aftermarket per Keith. I believe they are magnaflow.

I also believe I have some pinhole leaks, but they are after the cats.
@dirtydeeds.

Thanks,
Jon
 

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That’s your passenger cat being ‘less efficient’ than the ecu is expecting.

Grab and 18mm anti fouler from Autozone. Drill it out. Install on sensor. And screw back into truck.

Give a call with any questions. 760-877-4234
 

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Premium Member
Joined
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4,244 Posts
Discussion Starter #3
That’s your passenger cat being ‘less efficient’ than the ecu is expecting.

Grab and 18mm anti fouler from Autozone. Drill it out. Install on sensor. And screw back into truck.

Give a call with any questions. 760-877-4234


Thanks Keith

I want that on the front or the rear sensor?
 

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Rear sensors monitor the cat.
Front ones control the air fuel ratio.

So you need to put the cheater on the rear sensor on the affected bank.
 
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