Ahhh, you shoulda mentioned that you lived in Cali. They (parts stores)
won't scan for free, won't scan at all as a matter of fact. Only state in
the country that doesn't allow that for some strange reason.
Nothing strange about it. In California, in order to perform
retail emissions repairs, the facility performing those repairs
has to be CARB certified. Ain't no way the counter drones at
AutoZoo are going to qualify. This all tracks back to when
AutoZoo -did- perform free code retrieval, seems they were
clearing the codes and failure history making a legitimate repair
by a qualified shop that much harder. The state put the keebosh
Code p-1870 is common on these.The most likely cause on this if vehicle has
a few miles on it is the T.C.C. regulator apply valve has worn into the
bore of the valve body.You will probably have to go to a good transmission
shop and have them pull the valve body off.They will have to be sure to use
a TRANSGO recalibration kit to repair it.The kit comes with a new style
valve designed to fix this specific problem.It should take about 2-3 hrs.
to fix. Good luck.
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