partsandservice
Senior Member
Dealing with an issue when the engine would abort parked regen and instruct to check active codes. 650K E273176 Active codes:
27 3 EGR position open or short
3251 4 DPF pressure short to ground
1569 31 engine derate active
3719 16 Filter soot level very high
111 18 Engine coolant level low
After repairing rodent harness damage at the EGR connector and finding a harness plug connector loose behind the fan, the EGR and coolant level codes went inactive. The other three remain active. So I am trying to run down the 3251 4. Can't find any short to ground at the DPF pressure differential sensor or the exhaust temp sensor which share power supply. The DPF sensor shares return with intake, charge air and EGR to sensors. Checked the sensors for ground and ohms . The intake and charge air sensors both ohm about the same , but EGR temp sensor has double the ohms of the other two. It looks the same as the other two but has a copper washer instead of oring seal and the plugs won't interchange. So I decide to try the parked Regen ant this time and it completed it!! But the 3251 4 code is still active but the only active code. The service book yellow is NOT on anymore. So does anybody have any Idea if I need to keep trying to resolve this code or call it good? I can't find any short in the circuit and machine functions properly. Just that is worrying me there is still an issue that may affect the auto regens in the future. Thanks
27 3 EGR position open or short
3251 4 DPF pressure short to ground
1569 31 engine derate active
3719 16 Filter soot level very high
111 18 Engine coolant level low
After repairing rodent harness damage at the EGR connector and finding a harness plug connector loose behind the fan, the EGR and coolant level codes went inactive. The other three remain active. So I am trying to run down the 3251 4. Can't find any short to ground at the DPF pressure differential sensor or the exhaust temp sensor which share power supply. The DPF sensor shares return with intake, charge air and EGR to sensors. Checked the sensors for ground and ohms . The intake and charge air sensors both ohm about the same , but EGR temp sensor has double the ohms of the other two. It looks the same as the other two but has a copper washer instead of oring seal and the plugs won't interchange. So I decide to try the parked Regen ant this time and it completed it!! But the 3251 4 code is still active but the only active code. The service book yellow is NOT on anymore. So does anybody have any Idea if I need to keep trying to resolve this code or call it good? I can't find any short in the circuit and machine functions properly. Just that is worrying me there is still an issue that may affect the auto regens in the future. Thanks
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