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2004 Nissan Altima Base 4dr Sedan 2.5 Manual

2004 Nissan Altima
Trim Info:
Front Wheel Drive, 4 Door Sedan, Compact
23 mpg city / 30 mpg hwy
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August 20, 2012, 11:05 pm

Charles S

Question: how to fix code po171 and po174

I bought the car used with 62000 miles on it, the service engine light came on and I had the intake replaced and then the plugs replaced and a little while later the service light came back on came back on. I had the codes read and it shows the same thing. The car is great but this problem is not being fixed, what do you suggest! Thanks for any help!!!

August 23, 2012, 6:22 pm

Elizabeth K

Try cleaning the MAF (mass air flow) sensor. And here's some diagnostic steps for your codes:


1/1 users found this helpful.

August 30, 2012, 12:04 pm

Charles S

I changed the MAF sensor as well as cleaning the first one, still doing the same thing! I have put about $1000 in to this problem but it has not been fixed, The car is great, I just want to get it to run like it is supposed to. This is my third Nissan and I had great service with the other 2!

0/0 users found this helpful.

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