P1747 Code Help
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Junior Member
Joined: Apr 2018
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P1747 Code Help
Hello,
New to the forum! This seems like a great resource. My 1998 Ford F-150 4.6l V8 just threw engine code P1747. It still runs, but occasionally lacks power after a downshift. Rpm's will drop from 2500rpm-1000rpm. Seems like some sort of connection issue somewhere. I was wondering, How would I go about troubleshooting this. Should I be checking for shorted wires? and where would they be? Any help would be greatly appreciated! Thank You!
New to the forum! This seems like a great resource. My 1998 Ford F-150 4.6l V8 just threw engine code P1747. It still runs, but occasionally lacks power after a downshift. Rpm's will drop from 2500rpm-1000rpm. Seems like some sort of connection issue somewhere. I was wondering, How would I go about troubleshooting this. Should I be checking for shorted wires? and where would they be? Any help would be greatly appreciated! Thank You!
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,489
Likes: 7,618
From: MI
OP's DTC reads, -
P1745 Line Pressure Solenoid System
P1746 Pressure Control Solenoid "A" Open Circuit
P1747 Pressure Control Solenoid "A" Short Circuit
P1748 EPC Malfunction
P1749 Pressure Control Solenoid Failed Low
P1751 Shift Solenoid A Performance
P1754 Coast Clutch Solenoid Circuit Malfunction
P1755 Intermediate Speed Sensor (ISS) Malfunction
P1756 Shift Solenoid B Performance
P1745 Line Pressure Solenoid System
P1746 Pressure Control Solenoid "A" Open Circuit
P1747 Pressure Control Solenoid "A" Short Circuit
P1748 EPC Malfunction
P1749 Pressure Control Solenoid Failed Low
P1751 Shift Solenoid A Performance
P1754 Coast Clutch Solenoid Circuit Malfunction
P1755 Intermediate Speed Sensor (ISS) Malfunction
P1756 Shift Solenoid B Performance
Junior Member
Joined: May 2021
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I had the same problem, multiple codes all at once.
OP's DTC reads, -
P1745 Line Pressure Solenoid System
P1746 Pressure Control Solenoid "A" Open Circuit
P1747 Pressure Control Solenoid "A" Short Circuit
P1748 EPC Malfunction
P1749 Pressure Control Solenoid Failed Low
P1751 Shift Solenoid A Performance
P1754 Coast Clutch Solenoid Circuit Malfunction
P1755 Intermediate Speed Sensor (ISS) Malfunction
P1756 Shift Solenoid B Performance
P1745 Line Pressure Solenoid System
P1746 Pressure Control Solenoid "A" Open Circuit
P1747 Pressure Control Solenoid "A" Short Circuit
P1748 EPC Malfunction
P1749 Pressure Control Solenoid Failed Low
P1751 Shift Solenoid A Performance
P1754 Coast Clutch Solenoid Circuit Malfunction
P1755 Intermediate Speed Sensor (ISS) Malfunction
P1756 Shift Solenoid B Performance
Junior Member
Joined: Mar 2024
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From: Bainbridge, Ga.
P1747 bad solenoid or electrical? 2000 f150 4.6 triton v8
Howdy, I'm new here so I have code p1747 and codes for all 4 o2 sensors the sensor codes have been there but the 1747 is new, my question is how difficult is it to change that particular solenoid? Or any other suggestions to find out if I have an actual electrical short. Solenoid ohms good and not so sure about wires, when I ohm out wires going back to PCM two pins goes to ground and I don't know if they are supposed to.
Last edited by Charlie71; May 10, 2025 at 08:54 AM. Reason: Year
5 Year Member
Joined: Mar 2018
Posts: 226
Likes: 87
If memory serves, p1747 is the code for an EPC solenoid problem. I went down a serious rabbit hole when it happened to my truck. I went through the wiring harness looking for a short or open circuit to the solenoid. I even swapped out all the solenoids and internal transmission wiring harness and still had the code. Finally the only thing left was the ECM. I replaced my ECM with a unit from FS1, synced the modules using forscan, and I havent had any issues since.
