XC chassis / 300 ISB Cummins Check Eng light??

Mr. GSF,

Seems like everything has a sensor now. I've always wondered too exactly what that noise is when you turn the key to the acc. position. You can hear a clicking under the coach that runs the whole length. (Both of our coaches made the same clicking noise).

You will need to have the codes deciphered to see what the cause of illumination. Could be a sensor somewhere.

Good luck,
MM.

I would check with Freightliner/Gaffney to see if there is a built in code function (such as blinking lights when certain sequence followed).

If you have a coolant level sensor, that is one of the higher failure rate items.

Thanks, guys. Got to love all the sensors. "Gus" was great on our 2900 mile run at Thanksgiving & I went to pull him out to caulk some areas this morning & the darn light is on. I did start him & pulled out of the garage to pull the awning out, did my work, then fired him up & backed him back in. Light still on.
The coolant has the level sensor, & coolant level is good, plus I have the low coolant alarm on the dash, but guess that doesn't mean that sensor is good.
Guess it's time to shop around for the unit to read he codes.

We have a 14 mile round trip Thursday for the weekend. :-).

I hope your luck was better then mine as my 2003 Bounder needed a turbo when the check engine kept coming on. If that is the problem the repair is in the thousands not the hundreds. Jim

you have a 05. That coach should have a MMDC display. The MMDC has a diagnostics mode.

A check engine light can be almost anything from low fluids (you checked) to s bad wire going to the Ambient Air Temp sensor.

gatorcq wrote:
you have a 05. That coach should have a MMDC display. The MMDC has a diagnostics mode.

That must be the small panel next to my camera screen. I have played with it before and the diagnostic mode requires a code that I have not found yet. I do have all the original manuals and paperwork.
I did find out there is a big rig diesel shop 7 miles from my place and they will read the codes tomorrow.
Hopefully something simple & maybe they can show me how to read the MMDC display.

Thanks.

gsf35099 wrote:

gatorcq wrote:
you have a 05. That coach should have a MMDC display. The MMDC has a diagnostics mode.

That must be the small panel next to my camera screen. I have played with it before and the diagnostic mode requires a code that I have not found yet. I do have all the original manuals and paperwork.
I did find out there is a big rig diesel shop 7 miles from my place and they will read the codes tomorrow.
Hopefully something simple & maybe they can show me how to read the MMDC display.

Thanks.

When my light came on, i called Freightliner, gave my Vin # and they gave me my 4 digit passcode. I was then able to read the code. Searched Internet on the code, replaced low presuure fuel regulator on C7 CAT. Fixed the problem.

Try this
8127

gatorcq wrote:
Try this
8127

Thank you very much. This worked. Told the DW this is why I love these forums. Folks willing to help other folks.

Got 3 faults. Now to begin some homework and determine what they are.
Placing them here as well:

Here is what the display reads:

Fault 1 of 3

SPM 519 CM 0

OUT OF CALIBRATION
FMI 13 OC 11


Fault 2 of 3

CAB INTERIOR TMP
SPN 519 CM 0

MECH SYSTEM NOT RESP PROPERLY
FMI 7 OC 2


Fault 3 of 3

CAB INTERIOR TMP
SPN 519 CM 0

CURRENT OPEN OR BELOW NORMAL RNG
FMI 5 OC 33