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Discussion Starter · #1 ·
just turned 60,000 miles the weekend and a message about my brake light being out came up, then the check gas cap then my engine light came on. gas cap is on, brake lights work fine and truck runs perfect. stopped at autozone and the codes are
P0456
U0140
any ideas?
thanks
rob
 

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P0456 is evap leak. Could be cracked gas cap seal or hoses. Smoke machine would help find the source. U0140 is lost communication code between modules. Could be an isolated incident. Reset the light and see if it stays off.
 
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