Greetings --

I've reached the next chapter with my 2003 Discovery (72K miles) and have received my first SES light (unfortunately while I was out of town and my wife was driving it).

Anyway, after reading up on this forum, I went to Autozone to have the codes pulled. The codes are: p0174, p0150, p1174 and p1415.

I was able to find two of them online and they appear to be related to oxygen sensors. Also, it looks that I'm about at the mileage that O2 sensors fail.

So, my questions are:
1) Are all 4 of these codes related to O2 sensors failures?
2) Is there an OBD-II registry where I can easily look these up? I found some online, but they weren't complete.
3) I have an '03 Discovery. On Atlantic British I could only find a front and back O2 sensor. I found some references on this forum to replacing 4 sensors -- was that perhaps for D1s only?
4) I checked RAVE manual and sensor replacement looks incredibly easy. Are there any gotchas on this swap, or is it really as easy as it looks?

Thanks for your advice and help!
RedAustinIX (Ed)

 

http://mechanicdoctor.com/default.aspx

When was it's last tune up?

 

Spike --

Last tune-up was June '08 at 50K miles.

Thanks,
RedAustinIX (Ed)

 

Well 90% of O2 codes on a LR are due to the need of a tune up, but you should be fine there.
So it looks like new O2's are in order.
Usually when a bad tune up throws a code it is a "system to rich, bank A" type of code.

 

There are 2 in the front and 2 in the back. Pretty easy, just spray some PB blaster on them first and use an O2 socket.

I use www.iequus.com to search codes. What plugs and wires on the last tune?