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Old 11-10-2015, 02:36 PM
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P0740 Code

Trying to get my sons jeep inspected but this code popped up. Any ideas out there?

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Old 11-10-2015, 07:59 PM   #2
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That is a generic transmission code that is usually seen with at least 1 more specific code. Some readers won’t read some of the “secondary codes so it appears that this is the only one. The best advice if the trans is operating normally is to reset it by disconnecting the battery & see if it returns. If it does then you will have to dig deeper. You may need a scanner that reads trans (& other specific) codes.


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Old 11-10-2015, 08:30 PM   #3
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My 42rle does the same and a local shop diagnosed it as a tc replacement. Others recommend to check, add, or flush fluid. Check electronics. See online manuals for links to yours. I tried the ecm reset with no luck.

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