What does code mean P1684 mean on 2002 Dodge stratus
http://www.justanswer.com/dodge/5hma4-dodge-stratus-es-does- ignition-code-p1684-mean.html -- check this out
http://www.ask.com/question/p1684-code -- have you disconnected your battery lately? If so that's probably the cause. go by parts house (autozone) and have code cleared.
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