At this very moment my sole interest in joining this forum is to get my wife's 2000 v70 wagon (5 speed manual) to pass NC inspection. I may disappear if turning off the check engine light is going to cost me more than the 2005 325i my departing neighbor wants to sell me.

I've been reading the posts about fault codes (1670p), o2 sensors, throttle bodies, cats, the works; and I'm like , "oh boy,here we go now"!

" In the beginning (one week ago) God made..." my buddy. Who used his nifty Snap On Tools code reader with every vehicle under the sun programmed into it, and cleared some codes, one of which was for upstream o2 sensor. The other code was for a problem with accelerator pedal not communicating with throttle, although the car was running fine.

He cleared codes and this turned off ETS. He told me to drive it around awhile before taking it in for inspection. I did; and with check engine still on, it, not surprisingly I guess, failed.

Inspection guy said codes were 1670p, which he didn't know anything about, and one for upstream O2 sensor. Called buddy and he's going to try to clear codes again; but looks like big bucks already.

Wonder if getting one of those o2 sensor accessory wiring harnesses without having to replace the sensor itself would be sufficient? I doubt it. Judging from some other posts 1670 could indicate the ECM itself could be kaplunk.

It's like I said at the outset....the whole bank account. Think I'll by the bummer!

 

P1670 is a generic code for immobilizer communication. Nothing to do with emissions, so I can't believe that's the code failing the test for you. The O2 code is the problem. The harness is not going to be the issue.

No matter the cause, guessing will get expensive.

 

How many miles? How old is the sensor?

 

Been a while. Your advice was correct. Replaced 02 sensor. Problem solved. Thanks

 

Thanks for the guidance. I watched the intro video and created a signature. I'm going to add the mileage.