Smog functional check

1999 CHRYSLER TOWN AND COUNTRY
161,000 MILES • 3.8L • 6 CYL • FWD • AUTOMATIC
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FRANK LENTI
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My van failed smog. Mil/check engine light due to OBD communication failure.

Ignition timing check due to engine rpm being out of tolerance.


What could the problem's? do I have to get a new computer for my van or what could cause this?
Feb 13, 2017 at 12:42 PM
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HMAC300
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you need to have a mechanic check for a broken wire/bad connection etc. he has to scan for codes to see where to start.
Feb 13, 2017 at 1:11 PM
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FRANK LENTI
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How will he scan for codes if the OBD will not communicate with the scanner?
Feb 14, 2017 at 2:01 AM
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HMAC300
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because some scanners will not work and others will. besides he will check why it is not communicating anyhow to get it to read.
Feb 14, 2017 at 5:38 AM