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Altima Nissan Altima Sedan Discussion Forum

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Old 04-15-2018, 09:41 AM
RFKJR RFKJR is offline
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2005 Altima Sedan
 
Join Date: Nov 2015
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Default Codes 1273 1283 together

I am seeing these codes since I gutted the cats. Is there any way me cleaning out the cats is causing it to think it is running lean? SOmetimes i get one or the other, sometimes both. I have spacers under the rear O2's and havent got a cat ineffeciency code.
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Old 04-21-2018, 07:52 AM
RFKJR RFKJR is offline
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2005 Altima Sedan
 
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Default Anyone?

Any ideas? Maybe someone with headers ? Anyone seen these codes and firured out why? I have gone all over the intake with a can of carb cleaner looking for leaks. The car runs fine. Bank one long term fuel trim is 9 , bank 2 is 3. I would think it can ask for more fuel if it wants.
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Old 04-21-2018, 12:18 PM
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smj999smj smj999smj is offline
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2006 Pathfinder
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2003 Frontier KC SVE 4x4
 
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I don't have much knowledge on gutting the cats on a 2005 Altima, however, I know on the VQ40DE engines used in the Nissan trucks, if you gut the cats, it will cause a lean condition that needs to be addressed by a custom ECM program to address the issue, like UPREV. That may be what is going on with your Altima.
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Old 04-22-2018, 04:04 PM
RFKJR RFKJR is offline
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Thanks for your reply. I am still playing with this thing trying to determine what I will do to keep from seeing these two codes. I would expect to see my long term trim numbers much higher if it truly was a lean condition and longer injector pulse width was being used to richen it up. Basically at highway speed I see trims at 7 and 3 . I don't think that is unreasonable. I wish I had a way to ensure my fuel pressure is correct, but I havent bought the adapter to put in the fuel line yet. Another 50 I'll spend and use the tool once ! Oh well. The car runs very well, and I actually haven't got the codes since unhooking the battery overnight. Long term trims are coming back in, but so far no codes. I'm sure they will return. Another thing is once I clear the codes, they come back up pending, but won't put the light on during that trip. After shutdown and startup, the light comes on after warmup and steady driving.
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