Fail safe mode P2104, P0708, P2131, P2126, P2121, P1702

Tiny
VERNON3281
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
P2104, p0708, p2131, p2126, p2121, p1702 its in fail safe mode if I unhook battery and hook back up these codes are still on before I start 2005 expedition does start and idle no throttle wrench light on any help would be appreciated With the codes I provided in the last email I was wondering diagnoses procedure to pinpoint what I needed to fix thanks
Sunday, May 21st, 2023 AT 7:02 AM

2 Replies

Tiny
VERNON3281
  • MEMBER
  • 3 POSTS
With the codes I provided in the last email I was wondering diagnoses procedure to pinpoint what I needed to fix.
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Monday, May 22nd, 2023 AT 2:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,710 POSTS
Here is what the codes mean,

P2104 - Throttle Actuator Control System - Forced Idle:

P0708 - Transmission Range Sensor Circuit High Input:

P2131 - Throttle/Pedal Position Sensor/Switch 'F' Circuit Low:

P2126 - Throttle/Pedal Position Sensor/Switch 'E' Circuit:

P2121 - Throttle/Pedal Position Sensor/Switch 'D' Circuit:

P1702 - Transmission Range Sensor Circuit Intermittent:

So these codes for the safe mode I would replace the throttle actuator and the throttle pedal sensor assembly. Please start a new thread for the Transmission Range Sensor problems because we only handle one problem per thread, here is how to change the parts out in the images below. Check out the images (Below). Please let us know what happens.
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Monday, May 22nd, 2023 AT 2:25 PM

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