Just got my 2007 Xterra home today

mack_press

Test Drive
Location
Colorado
I flew out to CA on Saturday to check this out, and I bought it! Canceled my return flight and drove it home. Got a windshield chip on the way but no other new damage... definitely started out with several to-do items on this! Going camping this weekend so I'm gonna be in a bit of a rush for the less optional to-do's...

Picture attached from my home state but actually still about an hour away

PXL_20220613_212235729.jpg
 

TerryD

Total Tease
Supporting Member
Location
Covington, Va
Welcome!

 

mack_press

Test Drive
Location
Colorado
Thanks for the welcomes... unfortunately I failed emissions this morning. Hoping I don't have to replace the cats... P0300, P0420, P0430 and high NOx.
 

mack_press

Test Drive
Location
Colorado
Pulled the codes myself (I got the three I previously mentioned in the emissions report) and there's also a pending code for P0171 (System too Lean Bank 1)

Thanks Prime for the O2 sensor suggestion - that's a fix I can probably do myself (did it on my other car a couple of years ago) so I'm hoping that's all I gotta do.

Found these three threads in this forum that I'm going to read pretty carefully if that doesn't help:
 

mack_press

Test Drive
Location
Colorado
What I've done so far, yesterday and the day before:
- Replaced engine air filter & cabin air filters
- Changed oil (and oil filter)
- Replaced both upstream O2 sensors
- Replaced serpentine belt & its tensioner
- Cleaned the throttle body
- Cleaned the MAF sensor
- Replaced spark plugs
- Replaced intake manifold gaskets

P0420 went off again anyway... I've scheduled an appointment at the nearby dealership for a diagnostic. I don't know if I can take this camping tomorrow (2 hrs there) or if I should just use a different vehicle this weekend. At least I haven't seen any pending or logged misfires today. I'm out of my depth here, had to get friends to help me with half of what I've done to it, and there's only one thing I haven't tried yet that I know I can do with the tools available to me (except replacing the coil packs but I've heard those are expensive.) That's unplugging the battery for a bit to force the ECU to relearn things from scratch - but I've heard from a friend that may cause problems with the radio? I've got the stock radio still, do y'all know if disconnecting the battery causes any kind of anti-theft BS with it? I don't see anything about that in the manual.
 

TerryD

Total Tease
Supporting Member
Location
Covington, Va
What I've done so far, yesterday and the day before:
- Replaced engine air filter & cabin air filters
- Changed oil (and oil filter)
- Replaced both upstream O2 sensors
- Replaced serpentine belt & its tensioner
- Cleaned the throttle body
- Cleaned the MAF sensor
- Replaced spark plugs
- Replaced intake manifold gaskets

P0420 went off again anyway... I've scheduled an appointment at the nearby dealership for a diagnostic. I don't know if I can take this camping tomorrow (2 hrs there) or if I should just use a different vehicle this weekend. At least I haven't seen any pending or logged misfires today. I'm out of my depth here, had to get friends to help me with half of what I've done to it, and there's only one thing I haven't tried yet that I know I can do with the tools available to me (except replacing the coil packs but I've heard those are expensive.) That's unplugging the battery for a bit to force the ECU to relearn things from scratch - but I've heard from a friend that may cause problems with the radio? I've got the stock radio still, do y'all know if disconnecting the battery causes any kind of anti-theft BS with it? I don't see anything about that in the manual.
If it's the basic radio, you'll just lose your presets and adjustments.
 
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