When my 2004 Lincoln Aviator is turned 'off' the drivers seat used to position itself for easy exit. Now this feature no longer works and the driver's side seat adjustment (up down, backward forward adjustment) doesn't work. The accelerator pedal no longer works either. The system setup display states 'data error'. This problem happened AFTER the vehicle was serviced for a 'check engine' status (which turned out to be a gas seal leak at the gas cap). Help...!!! can't adjust drivers seat, mirror or pedal position anymore.

Question edited for clarity.
Question moved to model category.

Probably Positive Crankcase Ventilation (PCV) Hose

Pictures

https://www.google.com/search?q=2004+lincoln+aviator+vacuum+breather+hose

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Lincoln aviator how do reset anti theft on 2005 lincoln

?????????????? Where is it ????????? What about it ??????

Principles of Operation
The driver seat module (DSM) is on the controller area network (CAN) communication network. To support several vehicle subsystems, the module permits intermodule and diagnostic tool communications.
The DSM controls the memory driver seat and the passenger memory power exterior mirror. This passenger memory power exterior mirror feature allows the driver to program personalized mirror positions. Once the driver stores a mirror position, the driver can recall the setting by pressing the corresponding memory switch or by using a programmed remote keyless entry (RKE) transmitter. For additional information, refer to Section 501-10 .

How to Diagnose Controller Area Network CAN

Driver Seat Module - Memory Seat
The power driver seat, power outside rear view mirrors and power adjustable pedals are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option. The DSM is located on the driver seat track.
This system allows automatic positioning of the driver seat to 2 programmable positions.

• A power driver seat position can be stored at any time. The driver must move the seat to the desired position using the driver seat switch assembly. The driver must then depress the memory SET switch which activates the memory SET switch light emitting diode (LED). Within 5 seconds (before the LED goes out), the driver must select a memory position. Memory 1 is selected by depressing memory switch 1. Memory 2 is selected by depressing memory switch 2.
• If no memory switch input is received within the 5-second time limit, the operation is aborted and the memory seat position switch (set switch) LED is turned OFF. This also occurs if one of the following inputs is received during the 5-second programming limit:
  • Driver seat control switch
  • Memory seat position switch (set switch)
  • Power adjustable pedal switch

A programmed seat position can only be recalled when the transmission selector is in PARK or NEUTRAL with the ignition switch in the RUN position. A position may be programmed at any time.

Easy Entry/Easy Exit
The driver power seat easy entry/easy exit feature can be enabled/disabled. Refer to Section 418-01 or the owner's literature.

This may need to be done with a scan tool

with car off and keys in pocket open hood and check all pulleys and components something not turning possible seized such as idler pulley alternator noise is belt being dragged over something not turning

plastic cover at swivel to frame should open to reveal screws

They need to be reset by the factory

Position items,press set ,then #1 or #2

No owners manual ?

Helm.com --- to buy one

For mirrors you need to move the switch to the side you want

It's pretty common on fords for one of two things to happen. Either the wiring to the brake switch located on the brake pedal lever has broken or the brake switch itself is bad. If you look up under the drivers die of the dash it should be fairly easy to determine if the wires are broke. If the wires are not broken its not to hard to see if the switch is bad. One wire should have power all The time. The other will have power when the pedal is depressed. If the other wire never powers up than the switch is bad.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Take it to a Lincoln dealer. The Lincoln body has a longer warranty than most cars. Your liftgate may not be made of metal, but the through and through failure warranty from Rust could be questionable enough to cover it.

We had a new door and trunklid warranteed after 5 years on our Mark 7. Plus they painted the entire car.