2003 1500HD OBDII Monitors always show "not supported"
11-07-2016, 09:39 AM
#1
Racer
Thread Starter
2003 1500HD OBDII Monitors always show "not supported"
Took my stock truck in to get emissions done and failed due to "not supported". "Not ready" is different. So I changed the tune with HPtuners to put the dtc's to no. 3 not reported and still getting the samething. Bad pcm? Can't find anything on the web with a comparable situation. Anyone ever see this?
11-07-2016, 10:56 PM
#2
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I have not seen this, but what monitors are coming back as not supported ? My best guess would be something in the tune (EGR, Heated o2, etc.) is not being recognized by the computer.
11-08-2016, 12:57 PM
#3
Racer
Thread Starter
Catalyst, heated catalyst, evap, sec. air system, a/c, o2, and egr all come up "not supported". With stock tune and with "do not report" tune. I'm baffled here. I have an extra 411 pcm from my vette. Gonna read if I can toss that in. Any ideas anyone!? Thanks.
11-08-2016, 03:45 PM
#4
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If all of those are coming up as not supported there has to be a problem with the tune. They all make sense on a heavily modified car except for the A/C, but withoug going line by line in the programming it will be hard to find. It sounds like the drivers are not present for those PIDs in the tune you have. BTW, you called it a "stock" tune, but if the ECM/PCM was modified in any way it is no longer stock.
