Limp Home Mode

[Sburn]

I had this happen yesterday after adjusting canned tune #2, 87 towing. To help Bill track this one down, here's the info:

2007 4.6

Had been running #2 tune for a few days with no custom changes and no issues. I then made a couple of changes from the base program:

Idle speed +75 (this seems to help driveability in parking lots)
WOT enrich 1.3 -> 1.5

Gear ratio from 3.73 -> 3.55

The canned tunes all seem to default to 3.73 even though my truck has a 3.55 (axle code 19 on the door sticker).

Tire size from 237X to 2337. Like gear ratio, canned tunes seem to start with very slightly incorrect values.

Not from a full cold start -- off for about three hours, but mostly warmed up (~160 degrees CHT). Taking off from a stoplilght, about 1/3 throttle, ETC light and loss of power hit right around 1-2 upshift. No CEL light.

Limped a few blocks to a parking lot, shut off. Key on, diagnostics, DTC P061B only. Returned to stock. Hit the drivethrough and back to job site on factory tune with no issues.

Back to PHP #2 tune without mods (load previous settings = NO) for the trip home (50 miles) with no issues.

Hex code and serial number should be in my profile.

[Power Hungry]

Here's what I need...

1. Connect to Pegasus (no need to return to stock).
2. Go to Utilities -> Read Critical Files.
3. In the "C:Program FilesPHPPegasusData" folder, locate the files "level2_0.eca" and "custom.eca" and please e-mail them to me.

This way, I can look at what was changed and see if there is something corrupted in the custom file that would cause the DTC and limp mode.

Thanks.

[Sburn]

Originally Posted by Power Hungry

Here's what I need...

1. Connect to Pegasus (no need to return to stock).
2. Go to Utilities -> Read Critical Files.
3. In the "C:Program FilesPHPPegasusData" folder, locate the files "level2_0.eca" and "custom.eca" and please e-mail them to me.

This way, I can look at what was changed and see if there is something corrupted in the custom file that would cause the DTC and limp mode.

Thanks.

Done, and on the way via email.

And that, folks, is how customer service is done by PHP. Thanks for the speedy response!

[Jackpine]

Sburn, I'm not Bill, but I DO try to help. Do you recall what your CHT was (since you are monitoring it) when you got the ECT light and you went into limp mode? Or, did I misunderstand and it WAS 160 when this happened? If it was in the normal range, your truck clearly did not overheat, but something made it "think" it did.

The trouble code you got was: "P061B Internal Control Module Torque Calculation Performance", which is helpful as hell, isn't it?

I can't believe your customized settings had anything to do with this.

Ah dear, I see I'm a day late and a dollar short again, Bill's already on it. I should have thought of corrupted files. But, of greater interest to me now, is why are files becoming corrupted now and then?

Even worse, now that I read a few posts back, I see this DTC is a definite symptom. I must be losing it!

- Jack

[Sburn]

Originally Posted by JackandJanet

Sburn, I'm not Bill, but I DO try to help. Do you recall what your CHT was (since you are monitoring it) when you got the ECT light and you went into limp mode? Or, did I misunderstand and it WAS 160 when this happened? If it was in the normal range, your truck clearly did not overheat, but something made it "think" it did.

The trouble code you got was: "P061B Internal Control Module Torque Calculation Performance", which is helpful as hell, isn't it?

I can't believe your customized settings had anything to do with this.

Ah dear, I see I'm a day late and a dollar short again, Bill's already on it. I should have thought of corrupted files. But, of greater interest to me now, is why are files becoming corrupted now and then?

Even worse, now that I read a few posts back, I see this DTC is a definite symptom. I must be losing it!

- Jack

Yes, normal temperature range. No big loads or towing. Just going from work to McDee's at lunch.

Agreed, this DTC looks like it might pop up every once in a great while. Might just be a 4.6 problem, also.

Thanks.

[06KingRanch]

I had this happen to me a few days ago.

Went into failsafe mode....but i just hit reset on my trucks LCD screen...and it was fine. I was towing my trailer on level 2, it has been on level 2 for a few months with no troubles.

I went in and retrieved the codes.....P061B and P2106.

What does this meen?

There were no high temps and it has ran fine since?

[88Racing]

Originally Posted by 06KingRanch

I had this happen to me a few days ago.

Went into failsafe mode....but i just hit reset on my trucks LCD screen...and it was fine. I was towing my trailer on level 2, it has been on level 2 for a few months with no troubles.

I went in and retrieved the codes.....P061B and P2106.

What does this meen?

There were no high temps and it has ran fine since?

Are you running canned or custom tunes?

Are you running a cai?

I think Bill going to have to look into this.

I will post a note on the mod board.

Lars

BTW please fill in your user info. Such as HEX code and gryphon serial number.

[06KingRanch]

Using canned tunes......everything is stock....stock intake with Amsoil air filter.

i'll fill in my details.
Thanks.

[Jackpine]

Looks just like what Sburn had, doesn't it?

So, by hitting the reset button for your message center, you made Failsafe mode go away?

This is sounding more like a glitch in the PCM, rather than something in a tune.

Wish we knew if Bill found anything in Sburn's files.

Since Lars is going to post a note in the Mod's board, maybe Bill will be able to tell us something.

- Jack