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Re: Check Trans and Engine light (code P1870)
and the codes are *stored*, usually. so the light doesn't have to be on for you to read the codes that are stored in memory. after you do the reading, clear the memory by disconnecting your battery for 30 seconds so that you can retest for any new codes set; otherwise you will be reading the same old code.
egr valve can be an issue. and you do have a single 02 sensor which can be an issue. read the codes and go from there. imo.
//bc
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1992 trooper 3.2L v6 sohc automatic...as is
i love a good intermittent electrical challenge. . .especially when it's someone else's.
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