Smog functional check

1999 CHRYSLER TOWN AND COUNTRY
161,000 MILES • 3.8L • 6 CYL • FWD • AUTOMATIC
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FRANK LENTI
  • MEMBER
  • 2 POSTS
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 4:42 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
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 5:11 AM
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FRANK LENTI
  • MEMBER
  • 2 POSTS
How will he scan for codes if the OBD will not communicate with the scanner?
Feb 13, 2017 at 6:01 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
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 13, 2017 at 9:38 PM
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