Error Codes P0171, P0174, P0734

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Disco Mike

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First never buy an after market MAF, they will throw codes right out of the box.
Your problem is slightly different then the ones listed above. you have a 447 which is an evap. fault along with 2 banks running rich as picked up by the 02's. How many miles on your 02's?
 

RoverProblem

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I change both of my oxygen sensors last the a month. when I install my orignal bosch MAF sensor it gives me codes P0174 p0171 p0734 p0447 when I install the NAPA sensors I get these codes p1172 p1175 p0447. any ideas ? i would hate to buy anther new MAF sensor they run $270 :(

Thank you for all your help!!
 

Disco Mike

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It would only be OK if the MAF has the same part number as the original and I don't believe Napa's does.
Go to British Parts of Utah for a fair price on the correct MAF.
 

Ahero4all

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It would only be OK if the MAF has the same part number as the original and I don't believe Napa's does.
Go to British Parts of Utah for a fair price on the correct MAF.


Disco Mike, Your presence,knowledge and participation on this site is greatly appreciated....The MAS is bad 1n my 99 Rover, was quoted $1400 by Local Dealer...Your suggestion of British Parts of Utah save my day...$195 feels oh so much better...
 

Ahero4all

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Hey Mike..

So, although my Rover 4.0 is titled a 99 it has a 98 build date....My mechanic said I need a 3 wire M.A.S....

what do you know about this?
 

ozdo4212

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Pull the intake manifold and install new gaskets check the condition of the intake manifold; p-0171 p-0174 gone !
 

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