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Old 12-28-2011, 03:13 AM
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blinking od light, while under load

alright here goes.. 2000 F-250 100,000 miles. So up until tonight i've had a blinking od light and the speedometer goes out intermittently quits working, for quite some time, but it always seemed to drive fine. Went out plowing and now when it comes on i seem to have no power, push the throttle and it bogs down and u can almost here it snap back in to having power when u let off. If u continue to push the throttle it will konk out completely. If you shut off the truck and restart it will be fine for a little while then do it all over again. Also the ABS light is on and has been for over a year..
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Old 12-28-2011, 03:19 AM
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Shouldn't have anything to do with the ABS light. If you OD light was flashing that means it detects a problem with the transmission (or related hardware). Did you check to see if you had any codes?
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Old 12-28-2011, 03:25 AM
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haven't checked for codes yet trying to track down a snapon code reader
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Old 12-28-2011, 03:55 AM
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Good luck. This isnt diesel related but but still Ford related. An old Explorer my parents drove, had the flashing OD light and it was a definite tranny problem. It went ignored for too long and eventually it would not shift out of park or nuetral and ended up destroying it.
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Old 12-28-2011, 04:20 AM
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Yea that is one light you don't want to ignore... Hopefully its not something to bad. If your speedometer stops working it may be more electrical than physical damage. Best case that's what it is, worst case new or rebuilt tranny.
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Old 12-28-2011, 04:22 AM
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Hopefully it's something in the steering column or something electrical and not the trans.
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Old 12-28-2011, 07:55 AM
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anybody know anything about this gem module that i keep seeing in posts? sounds like it may be related...
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Old 12-28-2011, 09:49 AM
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ok got a scanner here are the codes:

P0500 exaust pressure sensor fault:dunno
P1670 EF feedback signal?
P0478 exaust pressure control valve
P0470 Turbine shaft speed sensor
P0720 output speed sensor
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Old 12-28-2011, 02:21 PM
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The only thing trans related would be that output speed sensor I think.
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