Codes P0740, P0457 and gas light on - Jeep Wrangler Forum
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Old 10-04-2017, 11:43 AM
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Codes P0740, P0457 and gas light on

Hi all,

For the past few weeks my gas cap warning has been coming on so I replaced the gas cap four days ago. Two days ago the warning came back on along with the two codes mentioned above. I understand that the P0457 (Evap leak) code is probably related to that same problem but is there any relationship to the P0740 code?

I just replaced the gas cap and that didn't solve the gas/evap problem. I also saw that some people have had issues with a hose running near their battery getting abraded/corroded but my hoses seem fine. I put electric tape around them just to see and it made no difference. What else could be the problem?

As to the 0740 code, I'm going to drain/replace the transmission fluid as it looks old.

Thanks for any help

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Old 10-04-2017, 11:51 AM   #2
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http://www.jeepforum.com/forum/showthread.php?t=1225118

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Old 10-05-2017, 10:35 PM
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