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I am getting ready to buy a 94 f250. When I test drove it, the Od light flashed when stopped (dealer said it meant OD was off because we wern't moving - sure!) After searching I noticed all the posts about sensors.
Data:
7.3 turbo
174,000 miles
No light flash while moving.
Trans shifts normal
Light on at idle
At idle, tach reasd zero
Fluid is clean (may have been changed by dealer)
Question: Since there are no other problems but the tach, is it safe to assume the tach sensor sends inputs to the computer causing the light?
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