Code P1745, line pressure open for too long?

Tiny
MALLYBOY
  • MEMBER
  • 2010 DODGE GRAND CARAVAN
  • 3.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 105,678 MILES
This vehicle started this problem after a trip of 122km. I have replaced the valve body, the code returned. What exactly is the cause of this problem?
Tuesday, February 25th, 2025 AT 9:11 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,135 POSTS
This means the pressure control solenoid is stuck open or the line pressure sensor needs to be replaced.

DTC P1745 - Line Pressure Too High for Too Long

Here is how to replace the sensor. Check out the images (below). Please let us know what happens.
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Thursday, February 27th, 2025 AT 11:16 AM
Tiny
MALLYBOY
  • MEMBER
  • 316 POSTS
So, I would change them both, also use spark plug and wires should help as well.

Here is how to replace the sensor. Check out the images (below). Please let us know what happens.
I have replaced the valve body together with line pressure solenoid (VFS) and line pressure sensor. The code still returned. I also used live data stream to check line pressure sensor and it reads 2.30 volts.
I have checked resistance and voltage across the circuit and all checks good.
What next?
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Thursday, February 27th, 2025 AT 12:27 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,135 POSTS
You can see the line pressure to the desired line pressure is low, this can be because of an internal failure or the pressure regulator control solenoid, but you replaced that already, so I would say there is something broken inside the transmission.
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Friday, February 28th, 2025 AT 5:18 PM

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