LB7 Codes Please help (new here)

easy2envy

New member
Dec 19, 2016
8
0
0
Joplin, MO
Ok, so yesterday morning was the coldest its been yet here and I go out to start it up. It took longer start than normal assuming its because it was 2 deg. After it started it had a rough idle, kinda like it was loping a little. I go inside for about 20 min and when I come back out the check engine light was on, so i look up the codes on my edge attitude and it gave me these; P0522- engine oil pressure sensor low voltage; and a P0700- tcm requested MIL illumination. I had no other vehicle so i had to drive it (it drove fine) so i cleared the codes they didn't come back on all day, so I blew it off to as being really cold.

This morning I go out and let it all worm up again and right when I start it, the check engine light comes on instantly, only code it gave me was the P0700, so i tried to go down our little road and it would barley move. Also going from park to rev or into drive it would make a clunk sound. it also said something across the P.R.N.D.3.2.1 but i forgot what it said, it would come on then go away.
 

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
Reduced engine power? Or shift range inhibited?

The p0700 is just a basic code the TCM sends to the ECM to throw the light. Need to get a scanner or tech 2 to get the actual codes.

Also, I'd put the stock tune in and unplug the edge and see if it quits for the meantime.
 

easy2envy

New member
Dec 19, 2016
8
0
0
Joplin, MO
Reduced engine power? Or shift range inhibited?

The p0700 is just a basic code the TCM sends to the ECM to throw the light. Need to get a scanner or tech 2 to get the actual codes.

Also, I'd put the stock tune in and unplug the edge and see if it quits for the meantime.
It said shift range inhibited

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Awenta

Active member
Sep 28, 2014
4,090
2
38
CT
Get the rest of the codes with a better scanner


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easy2envy

New member
Dec 19, 2016
8
0
0
Joplin, MO
Ok i got the rest of the codes
P0841-trans pressure switch solenoid c stuck off
And
P0843-trans fluid pressure switch 1 circuit high voltage

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easy2envy

New member
Dec 19, 2016
8
0
0
Joplin, MO
Update: decided to drive my truck to a shop this evening and what do ya know, every thing is working fine! Idk whats going on, so for now im still blaming it on the 2deg mornings

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WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
When was the last time your internal filter was changed? My explorer did some goofy shit, I always had it flushed every 30k but no filter and I had the internal filter changed and then flushed and it fixed the pump whine and sloppy shifts.
 

easy2envy

New member
Dec 19, 2016
8
0
0
Joplin, MO
When was the last time your internal filter was changed? My explorer did some goofy shit, I always had it flushed every 30k but no filter and I had the internal filter changed and then flushed and it fixed the pump whine and sloppy shifts.
Just got the truck a few weeks ago, so idk when. Im trying to save to do a complete flush of everything

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fc8464

Member
Jun 26, 2012
71
0
6
Fairbanks, Alaska
Diagnostic Aids
Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:
A bent terminal
A backed-out terminal
A damaged terminal
Poor terminal tension
A chafed wire
A broken wire inside the insulation
When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.
You may have to drive the vehicle in order to experience a condition.
This DTC may indicate that C solenoid is mechanically defective or the shift valve is stuck in the stroked state.
When a P0841 and P0843 are set in combination, this may indicate an open circuit condition is present at the pressure switch circuit or the shift valve is stuck in the unstroked position.