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Old 05-06-2008, 07:16 PM   #8 (permalink)
Matt L
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Date registered: Nov 2005
Vehicle: 1996 210.020
Location: St. Louis Metro Area
Posts: 1,802
Quote:
Originally Posted by reyna7 View Post
Try this first:

Follow these instructions to override the sensor. (Your A/C compressor has its own pressure switch, so overriding the 'EC' light will not compromise this safeguard.) Switch the ignition on (position 2). Set the left temperature to 'HI' and the right temperature to 'LO'. Switch the ignition off. While holding the 'REST' button, switch the ignition on (position 2). On the left side, 'P1' will flash and on the right side, a code will be displayed. Press the 'EC' button twice so that the left side flashes 'P2'. Using the right side red temperature increase button, add 16 to the value. Press the 'EC button again to store the updated code. Turn the ignition off.
Don't blindly add 16 to the value. If it has been added before, adding 16 again will reset that bit (and have the effect of adding 32).

First break the number down into base 2. Determine if the 16's place has a 1 or a 0. If it has a 0, add 16. Otherwise leave it alone.

The 16's place in the P2 code will not prevent all occurrences of the code for low refrigerant, so the fact that you have the code does not mean that this modification has not been previously done.
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