2008 sounds like a loud 454 motor for approx 3 mins

2008 DODGE DURANGO
116,000 MILES
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JSCIBOR
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I startes the durango yesterday and it sounded like a 454 with no headers on it once warmes up it stopped at about 2-3 mins then runs fine the CEL came on today with code p0174 can any one help with why its making the sound
Jun 14, 2013 at 9:35 AM
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ERNEST CLARK
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P0174 means the o2 sensor is telling the computer that it's reading a lean-fuel condition in "Bank-2" of the exhaust system. Because you say your exhaust was loud, that sounds like you have an exhaust leak that's allowing air into the system up-stream of the sensor. This could be from a cracked exhaust manifold/pipe//converter, or a bolt has come loose.

It shouldn't be too hard to locate the leak. Good luck, and if you need help making a fix when you do, feel free to write back.
Jun 14, 2013 at 2:42 PM