Check engine light
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Check engine light
Hi, it would be greatly appreciated if someone can help me out with this. I have a 97 f350 7.5l California truck and I installed a set of Banks headers, now the check engine light is on because one of the upstream o2 sensors isn’t reading right. Is there a fix for this or is it ok just to leave it? Thanks
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Sandy mane, Yes I’ve checked the wiring.
my4fordtrucks, I have 2 upstream and one downstream. And I did have a shop weld in the other bung. Does it matter where it was placed?
thank you guys for the reply.
my4fordtrucks, I have 2 upstream and one downstream. And I did have a shop weld in the other bung. Does it matter where it was placed?
thank you guys for the reply.
Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
There are other possibilities listed for the code. See if you think any of these could be the culprit. If you have an ohm meter, I can send a test of the O2.
What repairs can fix the P0420 code?
What repairs can fix the P0420 code?
- Replace muffler or repair leaks in the muffler.
- Replace exhaust manifold or repair leaks in the exhaust manifold.
- Replace exhaust pipe or repair exhaust pipe leaks.
- Replace catalytic converter (most common)
- Replace engine coolant temperature sensor.
- Replace front or rear oxygen sensor.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
Doing some reading in my files I see where the O2 sensors should be in the same location as the originals.
Here is the quote I read
don't change the position of the sensor on the pipe, nor it's relative location as measured from the ports on the heads.
Here is the quote I read
don't change the position of the sensor on the pipe, nor it's relative location as measured from the ports on the heads.
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Hi sandymane, it could be any of those. I never had an issue till I put the headers on. I changed the 2 upstream o2 sensors and reset the code and it was fine for about 250 miles and the check engine light came back on. It doesn’t seem to be running worse but I would really like to fix it. I really appreciate all the help on this.
More Turbo
Joined: May 2014
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Hi, it would be greatly appreciated if someone can help me out with this. I have a 97 f350 7.5l California truck and I installed a set of Banks headers, now the check engine light is on because one of the upstream o2 sensors isn’t reading right. Is there a fix for this or is it ok just to leave it? Thanks
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I purchased just the headers and y pie and connected to factory cat and after market muffler.
and I don’t believe the header is leaking, I can’t hear a leak but that doesn’t mean there isn’t one. That would make it code if it was leaking?
and I don’t believe the header is leaking, I can’t hear a leak but that doesn’t mean there isn’t one. That would make it code if it was leaking?
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