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Trouble Codes

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Old 03-31-2011, 03:53 PM
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Default Trouble Codes

Recently my check engine light came on, I had a code reader placed on my 2007 Wrangler JK. The following codes came up 0157, 0300, 0430, 0440 & 0456. Any suggestions on what these codes represent? I really need help!
Old 03-31-2011, 03:58 PM
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Google them. You know the jk has a built in code reader right?
Old 03-31-2011, 04:09 PM
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Originally Posted by ECHO
For your Evap Codes

p0440 - General Evap System Failure

p0456 - Evap Purge System Small Leak

I would look at your EVAP Canister- Bet it took a hit, there is a purge valve on the side and thats a good place to start looking - You may end up taking it in for a smoke test to find the leak.. I would check the valve conection to the canister

p0157 - O2 Sensor #2 Circuit Low

Check the O2 Sensor behind the cat and see if the wires are frayed or broken
Thank you for the info, looks like I might have my work cut out for me
Old 03-31-2011, 04:33 PM
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Originally Posted by ECHO
They don't seem to bad.. Looks like two things fired off multiple codes.. the tough one might be your P0300 - Mulitple Misfire.. Did you hit your Evap Canister off-road?
Haven't been off-road, maybe a rock bouced off the road
Old 03-31-2011, 04:37 PM
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Originally Posted by wranglernwb19621
Haven't been off-road, maybe a rock bouced off the road
Check your spark plug connecting wires and make sure they are good and seated on your spark plugs/distributor cap for the p0300 code.
Old 03-31-2011, 05:03 PM
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Originally Posted by Mad-Hatter
Check your spark plug connecting wires and make sure they are good and seated on your spark plugs/distributor cap for the p0300 code.
Will do, thanx for the info
Old 03-31-2011, 05:04 PM
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Originally Posted by Mad-Hatter
Check your spark plug connecting wires and make sure they are good and seated on your spark plugs/distributor cap for the p0300 code.
Will check that also



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