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SC400 Code 25 Lean Air-Fuel-Mixture

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Old 08-18-13, 06:36 PM
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LexusLove1
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Default SC400 Code 25 Lean Air-Fuel-Mixture

Hey guys, I got a code 25 on my 92 SC400, the car drives absolutely amazing. No hiccups or anything, I cleared the code and it took a good day and a half and about 100 miles later. I'm going to check the intake and vacuum lines for a leak. Hope fully its just a vacuum leak but it might be time to remove the injectors and clean them and do fuel filter replacement. I just dont understand because the car runs amazing. The car was running hot at idle when I got it but I burped the system and it doesnt overheat now.
Old 08-20-13, 07:52 AM
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SC400slide
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It is most likely your o2 sensors. They go out often on these SC's, as they eat them like candy.
Old 08-20-13, 03:08 PM
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durps
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I have the same code. It says its running rich too lol. Replaced the o2s already. I think its the maf.
Old 08-21-13, 07:14 AM
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LexusLove1
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Ok, expensive O2 sensors . Probably why my MPG isnt so hot. I just need to replace upstream right. Downstream is just verifying the cats?

I'm going to try to pull the injectors and clean them.
Old 08-21-13, 07:35 AM
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Originally Posted by LexusLove1
Ok, expensive O2 sensors . Probably why my MPG isnt so hot. I just need to replace upstream right. Downstream is just verifying the cats?

I'm going to try to pull the injectors and clean them.
If the OEM's are to expensive it'd be better to use the universals. They aren't as much. And if I were you, I'd replace both o2 sensors.
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