DTC - Engine values

[kymg]

G'day,

My 2002 V70 NA threw the P0171 code the other day.

As part of the trouble shooting I am looking at the numbers for the various sensors on my OBD reader. It tells the RPM which is an obvious one and temp too but the others don't mean a lot to me but I suspect that they will help me diagnose the problem.

Can anyone point me in the right direction with a list of numbers or ranges of numbers that will let me know if things are within a correct range or really skew wiff.

The numbers relate to O2 sensors, short term fuel and long term fuel etc. I am just not sure what to search for on the site.

Any help gratefully received.

Cheers

[abscate]

That code is usually caused by a vacuum leak, which is caused by a crumbling hose somewhere.

Find the sticker under the bonnet which shows the vacuum routings and start pulling each one off, inspecting, and replacing . After 18 years, they are well past end of designed end-of-life