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Transmission will not engage and code P0503

Tiny
VALERIE MILLER
  • MEMBER
  • 2004 MERCURY MOUNTAINEER
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 225,000 MILES
Vehicle will try to engage in gear, but wines like a possible sensor. No R, D, or 321 and when put in park it will still rolls like it's in neutral. Code I got P0503. Could the WSS cause this issue?
Wednesday, May 13th, 2020 AT 5:05 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
The code is related to the transmission control circuit. However, it sounds more like a linkage issue or the range sensor is bad.

Tell me, You said, "No R, D, or 321." Do you mean the indicators don't light up? Is it staying in P only?

Also, the shift lever linkage is adjustable. It could even be disconnected at the transmission. I attached a pic of the linkage on the trans. Make sure it is connected and tight.

Let me know what you find and also, let me know if you checked the fluid.

Joe
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Wednesday, May 13th, 2020 AT 9:36 PM

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