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Discussion Starter · #1 ·
Hello All,

I hope everyone is doing well and id like to thank anyone in advance for any help or advice you can offer.

Car Details:
2007 Hyundai Elantra GLS with Automatic Tranny - 90k miles

Issue Details:
While driving tranny slams into protection mode, codes received are P0700 and P0755. The car goes out of protection mode and drives normal after turned off and back on again.

Important Notes:
This has happened before about 8 months ago. I fixed it by changing the fluid, the filter and the transmission speed sensor (input only). It happened again about month ago then went away. now its back again today.

Any advice or help on what this could be would be greatly appreciated. as of now my only assumption is that its the output transmission speed sensor or a bad ground somewhere. but that wouldn't explain why its happening so inconsistently. Thanks again.
 
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