2008 sounds like a loud 454 motor for approx 3 mins

JSCIBOR

MEMBER
2008 DODGE DURANGO
116,000 MILES

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

Friday, June 14th, 2013 AT 9:35 AM

1 Reply

ERNEST CLARK

MECHANIC
1,730 POSTS

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.