Code reader cannot see PCM?
Code reader cannot see PCM? I have gotten a two SES lights over the last several months so I have taken my car to AutoZone to get the codes read. However, both times they could get no response from the PCM, no acknowledgement or reading at all. This has happened at different times and different stores and even while trying multiple readers at the same store.
The SES lights went away after a few days so I was not real concerned but I have emissions testing coming up - I don't want the same thing to happen there during the PCM test and end up having to take a sniffer test.
Otherwise the car acts normally and runs great.
Anyone have any ideas why code readers might not see the PCM? What can I do about this?
Thanks,
Steve
The SES lights went away after a few days so I was not real concerned but I have emissions testing coming up - I don't want the same thing to happen there during the PCM test and end up having to take a sniffer test.
Otherwise the car acts normally and runs great.
Anyone have any ideas why code readers might not see the PCM? What can I do about this?
Thanks,
Steve 
Originally Posted by horist
check the cigarette lighter/accessory fuse in the car
if your cig lighter doesn't work then that's the issue (DLC plugin gets power off that circuit)
if your cig lighter doesn't work then that's the issue (DLC plugin gets power off that circuit)
I would NEVER have guessed that a fuse could be the problem - thanks alot!!
Steve 
