HELP! Power loss.. lambda sensor?

I have a 2001 micra 1.0 s, it's only got 24k miles but i've been experiencing power loss and my engine management light is saying it's running too lean.
I checked the spark plugs and they were kind of old and the gap was far too big so i just got new ones and adjusted them properly also got a new air filter but it's not helped at all. I think i might have to replace the lambda sensor but they can be a little pricey so is there anything else i could check incase i end up buying a new sensor i don't need?
 
Back
Top