Emissions test failure - no OBDII communication

Could be a bent pin on his code reader too... it seems very odd that a computer would just stop communicating. You'd probably know it if the computer had lost power too.

You could try buying your own OBD2 reader or see if someone else's works, like at auto repair place or parts store.

I doubt it was his code reader as another guy just ahead of me successfully passed the test. I will still borrow a OBDII reader to see if I get any different results. Assuming I get the same communication error, what do I need to look into? Thank you.

Mark wrote in news:9aae5eea-61d6-4e21-ac62- snipped-for-privacy@34g2000pru.googlegroups.com:

Was the tech using a CAN-compliant reader to check your non-CAN system?

I am not sure about that, but I have been going to the same place for the past 6+ years. I have not had any issues in my previous 3 tests at the same place. And it is the same guy I have been seeing since then.

Wow.. believe it or not, it was actually his code reader that was problematic. I had a new OBDII scanner that I got from amazon a few months ago. Just for curiosity, I hooked it up and it was able to get a reading. So I took it back to him and passed the emissions this time.

I didn't think it was his code reader as I saw 2 guys, before and after me, pass the emissions while I was there. So somehow his code reader didn't work only on my car. But today it took just a minute for him to get a reading and give me a Pass certificate.

Thanks all for your help.

I have a very similar issue with my 1997 ES300 Lexus (I'm the original owne r). 3 days ago I went to get a smog done but failed because of no OBD signa l communication during testing (a first). The car is a low mileage (110) an d previously had passed all other smog testing(last passed 2yrs ago). Vehic le gets its routine maintenance fluids/oil/ filters, belts, wipers, brakes, transmission/radiator flush and new battery to name a few but never had an y major mechanical repairs or modifications performed on the car. Aside fro m this current issue the car sounds and runs fine. Never experienced dashbo ard lights or a check engine light. I have done some online reading a commo n problem seems to be the cigarette lighter fuse but both of mine work sinc e I use them to charge my cell phone and Ipad on daily basis.

When I get home, plan on doing a visual inspection of the DLC for an bent o r damaged pins. I also read something about the OBD fuse that could also ca use this problem. Any help is greatly appreciated before I have to visit th e dreaded dealership.

Mark what brand of OBD reader did you use?

I probably won't be much help, but I do remember that some cars had the OBD fused on the same fuse for the cig lighter or power sockets.