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Old 09-08-2007, 07:42 PM
wiswind wiswind is offline
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Re: A/C, Odometer, Speedometer not Working, O/D Light Flashing

I am thinking that the O/D flashing is indicating that a TRANSMISSION code reading (at a shop) will give you a code(s) that will help you get to the root of the problem.
You can try the generic OBDII code reading to see if you get lucky and there are any codes there.
The flashing O/D light indicates that transmission codes have been stored, which require a different type of code reader.
A dealership or well equiped shop will have the code reader to read these codes.
The Speedometer and Odometer both run off of the Vehicle Speed Sensor (VSS) so the symptoms are pointing that way.
There are conditions, such as Wide Open Throttle (WOT), that when seen by the PCM, the A/C compressor is prevented from coming on.
However, all these things should cause a code or codes to be stored in either the PCM or Transmission code portion of memory.
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