Hi guys,
I failed DMV. Got several P Codes all same time. Need your guidance where to start (2003 Discovery). Im not a mechanic but if simple parts need replacement, I think I can do it. Just dont know which among these codes are related or separate problems. My spare Disco wont even start.

Codes are P0130, P0171, P0455, P1171, P1412

https://landroverforums.com/forum/at...1&d=1449185516

 

P0130 is Bank 1 Sensor 1 O2 Sensor
P0171 is System too lean Bank 1 (probably because of the O2 sensor)
P0455 is an EVAP Leak (probably a bad gas cap or purge valve)
P1171 is both banks too lean (again because of the O2 sensor)
P1412 is a bank 1 Secondary Air Injection fault (possibly because of the O2 sensor)

It looks like you just need an O2 sensor because the evap leak might be from a time where you just forgot to tighten the gas cap, but it could also be some sort of failure as well.

 

Thank you so much DiscoCam, I'll got all the sensors already. Ill try the gas cap as well. Also the MAF. I'm not sure if those parts from ebay are recommended but got them instead.

 

Be sure to do one thing at a time. Reset the codes then run it for a bit, see what comes back, if anything. If you change a whole bunch of stuff you won't know what actually fixed what.

Good luck, and let us know how it turns out.

 

No problem LR03NJ.
cappedup is right, do one thing at a time, sometimes only one part is causing a lot of fault codes.
Good luck.