engine light codes
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New User
Joined: Nov 2006
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engine light codes
hey my check engine light came on the other day so i got the codes to tell me the issue and now i need to figure out how to fix\what they mean. the first code i got was p071 bank one which means system to lean....what does that mean. And the next code i got was p0420 bank 1 which reads catalyst efficiency below threshhold. Lastly i got a p0174 which means system to lean. any ideas what i need to be looking at?
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Joined: Feb 2006
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Lean Codes Usually Mean A Vacuum Leak. The Cat Code Probably Means The Cat Is Bad. But Depending On How Bad The Vacuum Leak Is, Depends On How Hard The Cat Has To Work. Fix The Lean Codes And See If That Fixes The Cat Problem.
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