TCD read P1646, replaced evap vent solenoid, but problem not solved, mechanic think it could be the PCM , car runs find, just ses lights comes on with P1646 code, I just want to get car pass california smog test.............
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1998 Cadillac DeVille Question: Trouble Code P1646
Answer #1munkyrench June 15, 2009, 11:40Master
If the mechanic says "I think it could be the..." then they should have a good reason for it. It takes a very good understanding of the system to be able to diagnose these types of problems, which your mechanic doesn't seem to have. Find a Gold Shield Station near you and try having them diagnose the problem. http://maps.google.com/maps?f=q&source=s_q&abauth...
Don't let this mechanic guess with your money!