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Overdrive light flashing and low range light on

Tiny
ALEX ESGATE
  • MEMBER
  • 2003 FORD F-250
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 154,637 MILES
O/d light and low range light came on started to shift funny. Changed fluid and filter no change. Replaced VSS sensor and speed sensor still light flashing and long shifts. Anything else I could try?
Monday, March 21st, 2022 AT 11:20 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,244 POSTS
Hi,

If you replaced the sensor and there is no change, before spending any more money, have the can-bus scanned for codes. CAN stands for controller area network. Basically, all the different computers/modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing them.

Here is a link showing how it is done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know if this is something you can have done. I can understand the shifting issue if the OD light is flashing, but the 4lo is interesting.

Let me know.

Joe
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Tuesday, March 22nd, 2022 AT 9:16 PM
Tiny
ALEX ESGATE
  • MEMBER
  • 39 POSTS
Okay, I will get it scanned I have shifted the 4 wheel drive selector in and out and can hear it going in and out so do believe it is in 4 low just figured it may indicate what issue is.
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Wednesday, March 23rd, 2022 AT 4:35 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,244 POSTS
Hi,

If it is in 4low, the vehicle's top speed will be around 30 MPH. Is that what you are experiencing?

Let me know.

Joe
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Wednesday, March 23rd, 2022 AT 4:27 PM
Tiny
ALEX ESGATE
  • MEMBER
  • 39 POSTS
No I am sure it's not in 4 wheel at all.
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Wednesday, March 23rd, 2022 AT 9:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,244 POSTS
Hi,

Okay. Let me know if you find anything when having it scanned.

I will watch for your reply.

Take care,

Joe
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Thursday, March 24th, 2022 AT 6:59 PM

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