Hey all... new to diesels, not to Bimmers. This is a 2010 35d with 56k miles. The DPF regen works well, and the ash mass is way below max. The car runs really well, but mpg is low (about 19-20 mixed). I need some help determining what is going on with my CEL. I use Carly and here's what I'm finding...
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Summary:
Engine / Motor:
- Fault: measured air mass compared to the calculated air mass to low
- Code: 004862
- Fault: Exhaust pressure sensor upstream of the turbine, plausibility pressure upstream of the turbine to low
- Code: 004990
- Fault: Exhaust pressure sensor upstream of the turbine, plausibility pressure upstream of the turbine to low
- Code: 0048D1
Details:*** 4862:measured air mass compared to the calculated air mass to low ***
* Fault-Set 1 - ( 87424 km)
* * * Activation period for the main injection 1: 158.81 us
* * * Actuator voltage Up-level (1 byte) 0: 141.00 V
* * * Averaged value of the last three stored values self-diagnosis by the NOx sensor upstream of the SCR: -0.88 %
* * * Charge air temperature after intercooler: 202.00 degC
* * * Differential pressure across the particulate filter: -226.55 hPa
* * * DSMEnv_stECUEnv: 43.00 -
* * * EGR valve - output duty: 50.98 %
* * * Exhaust gas temperature before catalytic converter: 28.24 degC
* * * generator power: 133.00 A
* * * Injection amount PoI2 before correcting the fault monitoring: -95.72 mg
* * * Isttastverhältnis - low-pressure exhaust gas recirculation control (1 byte): 3.92 %
* * * Low-pressure EGR valve - corrected actual position: 6.27 %
* * * maximum rail pressure of the last 10ms: 462.75 bar
* * * MoCSOP_ctErrMM_mp 3: 114.00 -
* * * Normalized airflow ratio: 7.37 -
* * * Rail pressure - Setpoint: 494.12 bar
* * * Rail pressure control valve - adaptation factor for the characteristic line: 1.25 -
* * * Sensor offset by thrust calibration (Downstream): 519.89 ppm
* * * Speed of the E-fan: 4603.10 rpm
* * * status DSC: 39.00 -
* * * Status of Gradiententests: 0.00 -
* * * Status zero crossing detection: 249.00 -
* * * The measured from LSU lambda value 0: 0.26 -
* * * vehicle speed: 167.00 km/h
* Fault-Set 2 - ( 344 km)
* * * Activation period for the main injection 1: 1543.62 us
* * * Actuator voltage Up-level (1 byte) 0: 62.00 V
* * * Averaged value of the last three stored values self-diagnosis by the NOx sensor upstream of the SCR: 195.30 %
* * * Charge air temperature after intercooler: 93.00 degC
* * * Differential pressure across the particulate filter: -996.98 hPa
* * * DSMEnv_stECUEnv: 29.00 -
* * * EGR valve - output duty: 13.33 %
* * * Exhaust gas temperature before catalytic converter: 122.94 degC
* * * generator power: 2.00 A
* * * Injection amount PoI2 before correcting the fault monitoring: 43.78 mg
* * * Isttastverhältnis - low-pressure exhaust gas recirculation control (1 byte): 35.29 %
* * * Low-pressure EGR valve - corrected actual position: 48.24 %
* * * maximum rail pressure of the last 10ms: 705.88 bar
* * * MoCSOP_ctErrMM_mp 3: 132.00 -
* * * Normalized airflow ratio: 0.33 -
* * * Rail pressure - Setpoint: 329.41 bar
* * * Rail pressure control valve - adaptation factor for the characteristic line: 0.56 -
* * * Sensor offset by thrust calibration (Downstream): 698.22 ppm
* * * Speed of the E-fan: 4490.64 rpm
* * * status DSC: 136.00 -
* * * Status of Gradiententests: 89.00 -
* * * Status zero crossing detection: 18.00 -
* * * The measured from LSU lambda value 0: 0.00 -
* * * vehicle speed: 137.00 km/h
*** 4990:Exhaust pressure sensor upstream of the turbine, plausibility pressure upstream of the turbine to low ***
* Fault-Set 1 - ( 87424 km)
* * * Activation period for the main injection 1: 158.50 us
* * * Actuator voltage Up-level (1 byte) 0: 140.00 V
* * * Actuator voltage Up-level (1 byte) 1: 73.00 V
* * * Averaged value of the last three stored values self-diagnosis by the NOx sensor upstream of the SCR: -350.00 %
* * * Charge air temperature after intercooler: 93.00 degC
* * * Charge current limit (1 byte) 4: 188.24 mA
* * * Differential pressure across the particulate filter: -163.70 hPa
* * * DSMEnv_stECUEnv: 210.00 -
* * * Exhaust gas temperature before catalytic converter: 769.41 degC
* * * generator power: 97.00 A
* * * Injection amount PoI2 before correcting the fault monitoring: -84.72 mg
* * * Isttastverhältnis - low-pressure exhaust gas recirculation control (1 byte): 78.43 %
* * * maximum rail pressure of the last 10ms: 525.49 bar
* * * MoCSOP_ctErrMM_mp 2: 226.00 -
* * * MoCSOP_ctErrMM_mp 3: 115.00 -
* * * Performance EKP (U * I) filtered: 132.00 W
* * * Rail pressure - Setpoint: 1262.74 bar
* * * Rail pressure control valve - nominal value of the drive: 7.84 mA
* * * received neutral value for torque requirements from the drag torque control (MSR): 0.00 -
* * * status DSC: 186.00 -
* * * Status of Gradiententests: 93.00 -
* * * The measured from LSU lambda value 0: 32.65 -
* * * vehicle speed: 167.00 km/h
* * * Weighted average temperature of the SCR catalyst (1 byte): -37.65 degC
*** 48D1:Exhaust pressure sensor upstream of the turbine, plausibility pressure upstream of the turbine to low ***
* Fault-Set 1 - ( 87432 km)
* * * Activation period for the main injection 1: 628.26 us
* * * Actuator voltage Up-level (1 byte) 0: 126.00 V
* * * Averaged value of the last three stored values self-diagnosis by the NOx sensor upstream of the SCR: -399.80 %
* * * Charge current limit (1 byte) 4: 10164.71 mA
* * * Differential pressure across the particulate filter: -806.41 hPa
* * * DSMEnv_stECUEnv: 0.00 -
* * * EGR valve - actual position of sensor characteristic: 0.00 %
* * * Exhaust gas temperature before catalytic converter: -50.00 degC
* * * Injection amount PoI2 before correcting the fault monitoring: -100.00 mg
* * * Kraftstoffvorförderdruck - filtered (1 byte): 2989.61 mbar
* * * Learned duty for FPC for driving the diesel filter heater: -999.97 %
* * * MoCSOP_ctErrMM_mp 2: 83.00 -
* * * MoCSOP_ctErrMM_mp 3: 114.00 -
* * * Performance EKP (U * I) filtered: 61.00 W
* * * Rail pressure - Setpoint: 486.27 bar
* * * Rail pressure control valve adaptation factor for the characteristic (1 byte): 0.50 -
* * * Rail pressure control valve pressure setpoint of the rail pressure control (2 bytes): 12.91 bar
* * * Rail pressure control valve target current (1 byte): 455.00 mA
* * * received neutral value for torque requirements from the drag torque control (MSR): 6.00 -
* * * Regulator gear for prefeed to FPC: 0.00 -
* * * status DSC: 0.00 -
* * * Tank level - Fuel: 21.08 l
* * * vehicle speed: 166.00 km/h
* * * Vorfördermenge (1 byte): 0.00 l/h
* Fault-Set 2 - ( 278552 km)
* * * Activation period for the main injection 1: 0.00 us
* * * Actuator voltage Up-level (1 byte) 0: 123.00 V
* * * Averaged value of the last three stored values self-diagnosis by the NOx sensor upstream of the SCR: 119.53 %
* * * Charge current limit (1 byte) 4: 2917.65 mA
* * * Differential pressure across the particulate filter: -812.50 hPa
* * * DSMEnv_stECUEnv: 0.00 -
* * * EGR valve - actual position of sensor characteristic: 49.02 %
* * * Exhaust gas temperature before catalytic converter: 703.53 degC
* * * Injection amount PoI2 before correcting the fault monitoring: -70.29 mg
* * * Kraftstoffvorförderdruck - filtered (1 byte): 0.00 mbar
* * * Learned duty for FPC for driving the diesel filter heater: -328.70 %
* * * MoCSOP_ctErrMM_mp 2: 79.00 -
* * * MoCSOP_ctErrMM_mp 3: 144.00 -
* * * Performance EKP (U * I) filtered: 1.00 W
* * * Rail pressure - Setpoint: 0.00 bar
* * * Rail pressure control valve adaptation factor for the characteristic (1 byte): 1.33 -
* * * Rail pressure control valve pressure setpoint of the rail pressure control (2 bytes): 498.33 bar
* * * Rail pressure control valve target current (1 byte): 31.38 mA
* * * received neutral value for torque requirements from the drag torque control (MSR): 0.00 -
* * * Regulator gear for prefeed to FPC: 133.00 -
* * * status DSC: 43.00 -
* * * Tank level - Fuel: 0.00 l
* * * vehicle speed: 0.00 km/h
* * * Vorfördermenge (1 byte): 16.03 l/h
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Ok... so I also ran some parameters and found the "Pressure upstream of the particle measurement" didn't move at all... constant at 500 hPa. I doubt this is normal and am guessing a sensor failed. the problem is I can't figure out which one. I'm assuming from what I've been reading that the EXHAUST PRESSURE SENSOR (Part Number: 13627808013) might be the culprit. Or maybe it's the DIFFERENTIAL PRESSURE SENSOR (Part Number: 13627805758). Regardless, I'm still trying to figure out the readings and learn along the way.
My next steps are to do a smoke test for vacuum leaks, remove and clean the EGR and cooler, clean the pressure converters, replace the t-stat (and flush-n-fill), and I also got a random DEF injector code so I'm going to replace that. I'm not looking forward to chasing the problem with money, so if you are able to interpret the code readings above, let me know what you think.
Many thanks for your time...
07-03-2017, 12:11 PM
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