4x4, low range

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Nov 24, 2009 | 06:43 PM

bluetj98

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4x4, low range

hi everyone i just bought a f250 superduty with a v10 it has 86k on it and today when i was driving home from work the 4x4, and low range light came on then the overdrive "off" light was flashing pulled over turned it off cranked it back up and everything came back on. the truck feels normal shifts right and all just worried about those light flipping out if anyone has any info that would be great thank you.

Nov 24, 2009 | 06:58 PM

Tom

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From: Isanti, MN

Not sure about the low range light, but a flashing O/D light means the PCM thinks there is something wrong with the transmission. There is a transmission trouble code stored in the PCM's memory.

Unfortunately you can't read transmission codes with most scanners. You'll likely have to take it to a Ford dealer to get the codes read and interpreted.

Nov 24, 2009 | 07:24 PM

bluetj98

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thank you im goin to look over the wiring harness and hope for the best for the wallet

Nov 24, 2009 | 07:27 PM

senix

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From: Frederick, MD

wonder if autozone could read that code? Don't suppose since it has to do with the tranny..but worth a shot?

Nov 24, 2009 | 10:50 PM

firemech

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O/D light

Quote:

Originally Posted by bluetj98

I don't know about the low range light but I had the O/D light blinking and Ford told me to service the transmission, I did and everything was ok. When I took off the transmisison oil pan it had never been serviced since it was installed. Found the filter was so dirty it was starving the pump and causing cavitation. You might try that first.

Thanks,

Firemech.

Nov 25, 2009 | 02:59 AM

twags6

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From: Slatington, PA

Quote:

Originally Posted by senix

wonder if autozone could read that code? Don't suppose since it has to do with the tranny..but worth a shot?

Probably not but it wouldn't hurt to try. I know it wont work on the 7.3 engines since they weren't OBDII compliant. Maybe somebody near you has an AE scanner or something similar. Those will pull the codes.

Nov 25, 2009 | 12:56 PM

krewat

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From: Long Island USA

The OD light means the PCM has detected something with the transmission, but with the 4x4 and low range lights, that's all a big bunch of weird.

Any water on the passenger-side floor? Meaning water in the GEM connectors?

Either that, or you have a pinched wiriing harness between the cab and the frame. I found my wiring harness was pinched like that when the truck was new. Glad I found it early.