help code code p0171and p0174

[red101]

My Exp 1999 is throwing codes p0171 and p0174 and then th info on the reader says fuel/o2/o2 heater. Is this an Maf problem or intake manifold
Thanks

 

[2000StreetRod]

lean fuel mixture

A common problem with the SOHC V6 is shrinking of the upper and lower intake manifold gaskets. When they shrink too much, air gets drawn into the manifold that was not measured by the MAF sensor or filtered by the air filter. Replacement gaskets are fairly inexpensive and the replacement process is time consuming but not difficult. If the 00m12 kit has never been installed, you may want to purchase and install it. See Starting my 00M12 Installation

What are the specific other codes associated with the O2 sensor heaters? You may have a loose or shorted wire to one of the sensors.

 

[red101]

thanks 2000 street rod

Thanks, The codes when i scrolled down to get more info said: evap/Fuel/ Comp/Misfire/ o2 sensor and then o2 heater.

Nice write up this will really help me

 

[iwannabamedic]

the OHV motor does the same codes, replace the lower and upper intake gaskets, should stop the codes
good luck