Stuck in limp mode?

[JLee]

My 2006 is stuck in limp mode. The check engine light is on and I have checked for dtc's with the odometer. I had P0069 (boost key on rationality), P0237 (map sensor voltage too low) and U0121 (lost communication with anti-lock brake module). I checked connections, disconnected batteries and the codes have gone away but the light is still on and no power. Any ideas?

 

[goodguys75]

im surprised no one has posted... maybe they need more info???

 

[BIGNASTY]

Limp

LIMP MODE???? I sure hope your problem of being LIMP is not catching :-laf throw a couple of VIGRA down the tank and see if that helps. Didnt know that these trucks had a limp mode.

 

[Bob4x4]

My 2006 is stuck in limp mode. The check engine light is on and I have checked for dtc's with the odometer. I had P0069 (boost key on rationality), P0237 (map sensor voltage too low) and U0121 (lost communication with anti-lock brake module). I checked connections, disconnected batteries and the codes have gone away but the light is still on and no power. Any ideas?

you need to do the diagnostics for the dtc's... ... ... .

 

[JLee]

Got my Edge CTS going and cleared the codes. Now I'm just down to the P0237 so I'll do diagnostics on MAP.

When it's running right no Viagra necessary

 

[AH64ID]

I would guess that the MAP sensor has failed by the first two CEL's, or it's not fully plugged in. The P0069 could easily be caused by a failed MAP sensor.

 

[ETomlin]

my 07 went into limp mode from an open circuit for #3 injector, cant remember the code. Local mechcanic told me just clearing the code didnt fix the computer. He had to reprogram it, he talked about a couple different systems on the truck. I have put about 2k miles since he reprogramed it. Only charged me 50$

 

[JLee]

New MAP sensor from Cummins Northwest $71. 20 and all is good.

 

[HBarlow]

my 07 went into limp mode from an open circuit for #3 injector, cant remember the code. Local mechcanic told me just clearing the code didnt fix the computer. He had to reprogram it, he talked about a couple different systems on the truck. I have put about 2k miles since he reprogramed it. Only charged me 50$

A local independent mechanic "reprogrammed" your ECM?

Not likely.

I would be very skeptical of any independent mechanic who claimed he could reprogram your ECM.

 

[AH64ID]

New MAP sensor from Cummins Northwest $71. 20 and all is good.

Glad to hear it!

 

[JLee]

Yes, life is good again. A whole day and a half with no DTC's