Engine Code: Injector Circuit Cylinder 4 Intermittent on 1997 Dodge Grand Caravan

Got engine code P1231 on my '97 grand caravan; Injector Circuit Cylinder 4 Intermittent. Any idea what this means and could it be related to the recall on leaking O rings?

by in Dennis Port, MA on April 03, 2009
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1 answer
ANSWER by , April 03, 2009
An injector circuit code is an electrical fault. The P1231 is a manufacturer code. The problem is either in the injector, the wiring or the injector driver inside the computer. If you can get a labscope pattern of the injector, you could see which one of these options is the culprit. Any good shop should be able to scope your injector for 1/2 hour of labor.