Transmission overdrive light flashes after driving through water

2004 MERCURY MOUNTAINEER
179,000 MILES • 4.0L • V6 • 4WD • AUTOMATIC
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ASHLEY BUTLER
  • MEMBER
  • 1 POST
The overdrive light started to flash after truck was driven through deep water. No introduction of water into transmission at all. Throwing a laundry list of p codes.
Sep 27, 2019 at 4:09 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Hi,

More than likely you have water in a connector. I would suggest removing each connector that you find on the transmission and transfer case and inspect it for water intrusion. If you have any moisture or water spots or worse yet green growth then you will need to replace that connector because it can no longer keep out water.

If you can't find anything, please send me the list of codes and I will go through them to try and find the likely connector.

Let me know what you find and we can go from there. Thanks
Sep 27, 2019 at 8:18 AM
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