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#1
11-25-2008, 07:25 PM
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Jimmy Smog Fail Code
I have a 96 Jimmy that just failed smog in CA. The code that came up was
P1870: EVAP Ctrl System Small Leak Detected it also says on my smog paper. This vehicle failed MIL/Check Engine light due to a warning lamp failure. I saw on a few posts that that P1870 was a tranny code. Any help would be appreciated. My Dad gave me this Jimmy and he had the tranny replaced twice as well as the gas pump. 
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#2
11-26-2008, 08:16 AM
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Re: Jimmy Smog Fail Code
1870 is a code usually related to TCC slippage, caused by a worn trans valve body, other things can cause it but that is the most common. The small evap leak can be just a bad or loose gas cap, after that it gets more complicated to diagnose and usually requires the use of a smoke machine to pinpoint the problem.
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