I had the service engine light come on and took it to the dealership a month back. They said it was a P0174 issue and would cost be 800$ to fix. I indicated that I would like to ensure that was a "real" issue and would come back later. As I drove out of the lot, the service engine light went off!! Great and just what I had been reading on the websites. Now,a month later the service engine light came back on, but there also seems to be a pinging sound (rattle). so, tool the car back again into the dealership and they say P0171 and P0174 codes both show up and it will be $900 to fix!! Really frustrated and confused ... Any help appreciated.
P0171 and P0174 Codes on 2001 Nissan Pathfinder
by Visitor in Santa Clara, CA on April 20, 2010
ANSWER by Visitor , July 16, 2010
You don't want to hear my story. I got the same codes, ignored them for a while. I didn't want to pay $ 600 dollars for a MAF sensor. Found them online for $100. Changed it got new codes. Oxygen sensors, cat converters. Changed the sensor, went away. Converter codes stayed, dealer said the converters were bad ($3200 repair) Bought them online for $450, had the dealer install them for $500. Very tricky to install.
ANSWER by Bret Bodas , April 21, 2010
Here is some info on these codes: http://repairpal.com/OBD-II-Code-P0171-and-P0174 What is the shop recommending for repairs?