mid128 pid 411 fmi5

[tdawg]

2005 cm870 getting active mid128 pid411 fmi5. I got a new sensor but didn't mount it just plugged it in and turned the ignition on. Still has the code after trying to delete it. Shouldn't the sensor work without the motor running? I have a otr box that I can plug in that demandates the truck and I can delete the code if I hook it up.

[Rawze]

sounds like your dancing with delete garbage boxes not fit to run a lawn-mower to me.

it should be called the 'tear-up-an-engine-r-us' box.

[tdawg]

(02-23-2020 )Rawze Wrote:  sounds like your dancing with delete garbage boxes not fit to run a lawn-mower to me.

it should be called the 'tear-up-an-engine-r-us' box.

Box isn't on it. I have a brand new egr valve and delta p sensor. Im cleaning the tubes and don't know why the code at ignition without the truck running.

[Rawze]

As far as I can tell, the pid:411 has to do whith the Delta-P but I don;t have a reference to the mid# to see what error with the Delta-P it is.

Do you know the cummins fault code?

[JimT]

could be a wiring issue instead of the sensor. Did you check the contacts, wiring harness?

Are you saying you actually cleared the code after changing the sensor or did you simply change the sensor and the code didn't immediately go away? I ask because some of these codes, especially emissions related, need to see the diagnostic run and pass very specific tests before they will set or clear. For example, a search of the fault codes for my cm2250 shows 3 results for Pid 411:

1866 Exhaust Gas Recirculation Differential Pressure - Data Erratic, Intermittent, or Incorrect 1866 P411 411 2/2

2273 Exhaust Gas Recirculation Differential Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source 2273 P411 411

2274 Exhaust Gas Recirculation Differential Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source 2274 P411 411

The first one, 1866, only runs when the coolant temperature is above 158F then the ignition is turned off for at least 30 seconds. Then it will run the diagnostic at the next key on.

The 2nd and 3rd both require the ignition to be cycled then the engine idled for a least 1 minute before the diagnostic runs.

Also, all 3 will continue to illuminate the MIL until the diagnostic has run and passed for 3 consecutive trips.

I don't know if they are the same codes that apply to your 870, but I used them to illustrate the point.

[tdawg]

(02-23-2020 )JimT Wrote:  could be a wiring issue instead of the sensor. Did you check the contacts, wiring harness?

Are you saying you actually cleared the code after changing the sensor or did you simply change the sensor and the code didn't immediately go away? I ask because some of these codes, especially emissions related, need to see the diagnostic run and pass very specific tests before they will set or clear. For example, a search of the fault codes for my cm2250 shows 3 results for Pid 411:

1866 Exhaust Gas Recirculation Differential Pressure - Data Erratic, Intermittent, or Incorrect 1866 P411 411 2/2

2273 Exhaust Gas Recirculation Differential Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source 2273 P411 411

2274 Exhaust Gas Recirculation Differential Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source 2274 P411 411

The first one, 1866, only runs when the coolant temperature is above 158F then the ignition is turned off for at least 30 seconds. Then it will run the diagnostic at the next key on.

The 2nd and 3rd both require the ignition to be cycled then the engine idled for a least 1 minute before the diagnostic runs.

Also, all 3 will continue to illuminate the MIL until the diagnostic has run and passed for 3 consecutive trips.

I don't know if they are the same codes that apply to your 870, but I used them to illustrate the point.

I will check the wiring harness Tuesday
Thanks

[hhow55]

(02-23-2020 )Rawze Wrote:  sounds like your dancing with delete garbage boxes not fit to run a lawn-mower to me.

it should be called the 'tear-up-an-engine-r-us' box.

Mr Rawze tells it like it is. LOl

[TruckDoctor]

Sounds like a broken wire in the engine harness to me causing an open circuit FMI5 fault code. Also those pins at the Delta P connector are notorious for fretting over time and being loose and not creating good contact. usually when doing those sensors and other sensors like the Exhaust Gas Pressure I recommend getting a new sensor and pigtail connector or the pins to replace inside the connector.

[tdawg]

I put the new tubes on, hooked everything up and no codes. Must be a connection or wire issue.