04 g35 getting p1273 and p1283 help
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04 g35 getting p1273 and p1283 help
My son has a 04 g35 that has p1273 and 1283 codes. It idles fine, Runs and drives great .
This is list of what's done to it
75mm throttle body
Z1 Cold air intake
fast intentions High flow cats
Z1 Cat back exhaust
Did smoke test for leaks and didn't find any. Cleaned maf.
New coils and plugs.
Newish upstream O2 sensors.
We cannot figure it out.
Hopefully someone has some onsite on a solution since car won't pass emissions testing.
This is list of what's done to it
75mm throttle body
Z1 Cold air intake
fast intentions High flow cats
Z1 Cat back exhaust
Did smoke test for leaks and didn't find any. Cleaned maf.
New coils and plugs.
Newish upstream O2 sensors.
We cannot figure it out.
Hopefully someone has some onsite on a solution since car won't pass emissions testing.
Last edited by Georgiaboy8119; Aug 28, 2025 at 09:59 PM. Reason: Adding something
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elior9557
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Nov 7, 2008 06:01 PM