CaptainDean wrote:
WWDiesel wrote:
Forget the O2 sensor, the 2.8 CRD does not have any.
Forget the MAF code, its only function is to provide information to the ECM for the operation of the EGR valve and FCValve, both components of the EGR system.The MAF will not affect the running of the engine or will it cause a "limp" mode.
One thought, are you sure you have the correct connector on the MAP sensor? There have be a couple of reports where it got mixed up with one of the other connectors of the same size in that area.
You may want to invest in a better scanner since you are getting an O2 DTC and should not be getting them on this vehicle.
Thanks WWDiesel,
I could not find any mention of the MAP Sensor for the diesel engine, only the gas engines.
I'll bet you meant MAF.The scanner I use is the INNOVA 30203, CarScan
®-Code. I had understood it was a pretty good unit.
Erased the codes in the ECM and read the codes again. I'm now steady with P0403, P0183, P1140.
P0403 is EGR system malfunction -- don't care.
P0183 is Fuel Temp Circuit too high or low -- I'll have to check that.
P1140 is EGR Airflow Control Valve -- don't care.
Anybody know what the ECM will do when fuel temp is out of range? Does it shut down the engine?
Dean.
Dean,
No, I did not mean MAF and I do not have them mixed up!
MAF sensor is only used for EGR operation, it is worthless for engine operation or running otherwise. It is located behind in air cleaner box outlet just before the turbo intake boot.
The MAP (
Manifold Absolute Pressure) sensor is called a multitude of different things, but it's signal input to the ECM is essential and vital for the proper running and control of the 2.8 CRD engine. It is located/mounted on top of the combo intake manifold /valve cover at the rear of the engine.
This sensor allows the ECM to monitor air pressure within the intake manifold and is also used to monitor the incoming boosted intake air temperature.
In the Jeep FSM (factory service manual) you will only see it called or labeled a "Boost Pressure Sensor", but it is more than that, it also provides boosted intake air temperature data to the ECM. You will not see it called or labeled "MAP" sensor in the FSM, not sure why that is but the manufacture of the sensor, Bosch, calls it a MAP sensor.
Bosch calls it a: "Bosch 3.0 Bar T-Map Sensor" / PN 0 281 002 437
Some of the online Mopar vendors list it simply as a "temperature sensor", not sure why that is, but it is incorrect and misleading.
Mopar PN: 68031593AA
Description: AIR TEMPERATURE
If your scanner is giving you false or misleading data, that can be a problem...
_________________
Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve