Well i just changed my front O2 sensors, duetoa O2 malfunction bank 2 sensor one code and a bank one running lean code. After i changed them now both banks are running lean.

Any ideas? I just changed the plugs to bosch +4s. Ran seafoam. I am waiting on magnecor 8mm in the mail, 7mm magnecors are on it now.

Would not changing the rear O2s give me a problem. Or is this a sign of my MAF going bad, even though i dont have the 4th gear ratio code?

Any help would be appreciated. Thanks in advance.

2000 Discovery 115k

 

Should have changed out the rears at the same time.

 

I hope to order them this firday after i get paid. Should i wait until i change them to diagnose the problem.

Will it mess anything up if i drive it for a week?

 

You won't hurt anything in the mean time. Once you replace the rar 02's then go have your codes cleared and you should be fine.
I think Atlantic British still has 02's on sale at around $59.

 

well i replaced my rear o2's last night, cleared the codes, rode around for a bit until the CEL came back on. Read the codes again and still have both bank running lean, along with a gear ratio code p0733. Its starting to sound likethe MAF to me. Does this sound right?

 

Yes, now that the gear ratio code has reared it's ugly head, a MAF is in order.
If you want to order one for under $130, call Tony at Cerrone's, at 650-365-4145 and he will ship one right out.