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Re: 1998 Expedition miss due to a trans problem
Posted to Technical Theory Forum on 8/28/2017

P1747

EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver

Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded.

Short circuit causes minimum EPC pressure (minimum capacity) and limits engine... Login to read more.