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Old 04-24-2012, 03:41 PM   #1
Synyzter
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Should I be worried?

So today I was driving around like normal. Came home parked the car. When I left about 2 hours later, I noticed my engine light was on. Went to Autozone, and it was code p0174. I"m trying to narrow down why this is. The o2 sensor on the passenger side is brand new. After Autozone, I went to the gym. Leaving the gym, the light was still on. I gave it about half throttle, and the engine light went off and hasn't come back on since. Since I've been home, I disconnected the battery for about an hour, and then put it back on. I've taken the MAF and filter off and cleaned them both (AEM dryflow filter). I'm still waiting for the filter to finish drying and then I'll put it all back together. Now if I'm driving around and the light comes back on, what should I look into next? The o2 sensor on the passenger side is maybe 1.5 months old. The car is already street tuned with HPTuners for all of the current mods.
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Old 04-24-2012, 03:44 PM   #2
markpetersonii
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You're going to get the "search" answer in a bit. I would start by doing that. Just type in the code in the search and you'll get a ton of responses. I've had that code and I did the exact same thing.
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Old 04-24-2012, 04:29 PM   #3
Poncho Dan
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P0174 is Bank 2 Lean - could be a header flange leak, could be a clogged injector, could be a small intake leak on that side, could be coolant contamination, or it could be that anti-seize got on the sensor probe itself. Lots of possibilities.
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Old 04-24-2012, 05:09 PM   #4
loudmouthgoat
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Check for a crack in a weld in the entire exhaust. i had the same thing happen to me. I had a crack in my SLP catback...
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