Intermittent power loss has me at a loss

Higher Than Everest

New member
Joined
Nov 27, 2019
Location
Syria
TDI
2005 Jetta
2005 Jetta TDI, BEW engine suffering intermittent power loss, I recently replaced the MAF sensor and I am still getting a low voltage code. I just bought VCDS a few days ago so I'm not really sure what data would be best to obtain, but the engine codes are:

PHP:
Readiness Status: 00000000 01000111 11100000 11100000
MIL Status: MIL OFF
Comprehensive Components: Failed or Incomplete
Fuel System: Passed
Exhaust Gas Recirculation: Failed or Incomplete
Number of EOBD-related DTC(s): 0


Monday,27,July,2020,16:21:17:00354
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x86
VCDS Version: 20.4.1.0  HEX-V2 CB: 0.4526.4
Data version: 20200331 DS317.0
www.Ross-Tech.com

--------------------------------------------------------------------------------
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                Address 01: Engine  (038 997 016 R)

16:21:16
  0.0 mg/str   Mass Air Flow (actual)
  1040.4 mbar   Boost Pressure (specified)
  2193.0 mbar   Boost Pressure (actual)
Monday,27,July,2020,17:47:06:00354
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x86
VCDS Version: 20.4.1.0  HEX-V2 CB: 0.4526.4
Data version: 20200331 DS317.0
www.Ross-Tech.com



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 01: Engine       Labels: 038-906-016-BEW.lbl
Control Module Part Number: 038 997 016 R    HW: 028 101 181 2
  Component and/or Version: R4 1,9L EDC G000SG  0282
           Software Coding: 0150031
            Work Shop Code: WSC 95855 999 06161
                      VCID: 2D070C58C1012843C8D-5184
4 Faults Found:

17036 - Sensor Reference Voltage B
            P0652 - 000 - Voltage too Low - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 36.0 Nm
                    Speed: 0.0 km/h
                    Bin. Bits: 00100000
                    Bin. Bits: 00000000
                    Bin. Bits: 00100000
                    Bin. Bits: 00100000
                    Bin. Bits: 00000000

[B]16486 - Mass Air Flow Sensor (G70) 
            [/B]P0102 - 000 - Signal too Low
             Freeze Frame:
                    RPM: 1050 /min
                    Torque: 70.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Duty Cycle: 100.6 %
                    Bin. Bits: 00001100
                    Mass Air / Rev.: 530.0 mg/str
                    Mass Air / Rev.: 0.0 mg/str

19463 - Camshaft Position Sensor (G40) 
            P3007 - 000 - No Signal - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 32.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Voltage: 14.06 V
                    Bin. Bits: 00001011
                    Idle Stabilization: 0.0°KW
                    (no units): 48.0

18996 - Turbocharger Boost Control Position Sensor Circuit 
            P2564 - 000 - Signal too Low - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 34.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Lambda: 0.0 %
                    Absolute Pres.: 1030.2 mbar
                    Absolute Pres.: 1040.4 mbar


Readiness: 1 2 0 0 1

Here's something I noticed that might help narrow it down, there's a hissing sound coming from the exhaust when it has normal power, then it will change to a deeper tone and it will have no power. This is also when the MAF goes to zero. I made a log on VCDS while idling, not sure what information would be helpful but at least it's a start.

the logs can be found here: https://tazg.ca/LOG-01-022-105-112.CSV
 

Curious Chris

Top Post Dawg
Joined
Jun 11, 2001
Location
Pineview GA
TDI
Jetta Wagon 2003 RIP Rockford IL
You need to get to 100% throttle

You cannot do diagnostics at idle aka throttle position 0%. Log both actual MAF and Specified MAF, Actual MAP and Specified MAP, and throttle position as you want to filter the data by 100% throttle. At 100% throttle both specified MAF and MAP should peg at max value. So the MAP will go through a PID loop to stabilize and provide the MAF specified.

The DBW test is logging the above data full throttle from 1750 RPM to 4500 rpm repeat three times and send the data to me chrisidzerda@gmail.com
 

Higher Than Everest

New member
Joined
Nov 27, 2019
Location
Syria
TDI
2005 Jetta
You cannot do diagnostics at idle aka throttle position 0%. Log both actual MAF and Specified MAF, Actual MAP and Specified MAP, and throttle position as you want to filter the data by 100% throttle. At 100% throttle both specified MAF and MAP should peg at max value. So the MAP will go through a PID loop to stabilize and provide the MAF specified.
The DBW test is logging the above data full throttle from 1750 RPM to 4500 rpm repeat three times and send the data to me chrisidzerda@gmail.com
alrighty email sent bud

i got 2 new codes after doing that WOT test

PHP:
17036 - Sensor Reference Voltage B 
            P0652 - 000 - Voltage too Low - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 36.0 Nm
                    Speed: 0.0 km/h
                    Bin. Bits: 00100000
                    Bin. Bits: 00000000
                    Bin. Bits: 00100000
                    Bin. Bits: 00100000
                    Bin. Bits: 00000000

16486 - Mass Air Flow Sensor (G70) 
            P0102 - 000 - Signal too Low
             Freeze Frame:
                    RPM: 1050 /min
                    Torque: 70.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Duty Cycle: 100.6 %
                    Bin. Bits: 00001100
                    Mass Air / Rev.: 530.0 mg/str
                    Mass Air / Rev.: 0.0 mg/str

19463 - Camshaft Position Sensor (G40) 
            P3007 - 000 - No Signal - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 32.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Voltage: 14.06 V
                    Bin. Bits: 00001011
                    Idle Stabilization: 0.0°KW
                    (no units): 48.0

18996 - Turbocharger Boost Control Position Sensor Circuit 
            P2564 - 000 - Signal too Low - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 34.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Lambda: 0.0 %
                    Absolute Pres.: 1030.2 mbar
                    Absolute Pres.: 1040.4 mbar

16785 - EGR System 
            P0401 - 000 - Insufficient Flow
             Freeze Frame:
                    RPM: 1638 /min
                    Torque: 42.0 Nm
                    Speed: 13.0 km/h
                    Load: 14.1 %
                    Duty Cycle: 14.6 %
                    Mass Air / Rev.: 230.0 mg/str
                    Mass Air / Rev.: 440.0 mg/str

16618 - Boost Pressure Regulation 
            P0234 - 000 - Limit Exceeded (Overboost Condition)
             Freeze Frame:
                    RPM: 4284 /min
                    Torque: 210.0 Nm
                    Speed: 106.0 km/h
                    Load: 100.0 %
                    Voltage: 13.91 V
                    Bin. Bits: 00001000
                    Absolute Pres.: 1774.8 mbar
                    Absolute Pres.: 2376.6 mbar


Readiness: 1 4 0 0 0
 

Tdijarhead

Top Post Dawg
Joined
Nov 10, 2013
Location
Lawrenceville PA
TDI
2003 TDI Jetta Daughters Car, 2001 TDI Beetle, Wife’s car, 2005 Golf TDI Mine, all 5 spds
Low voltage, hows your battery? Are your battery connections clean and tight?

Check your vacuum actuator with a mighty vac, does it hold vacuum?
 

wonneber

Top Post Dawg
Joined
Oct 12, 2011
Location
Monroe, NY, USA
TDI
2014 Jetta Sportwagon,2003 Jetta 261K Sold but not forgotten
2x ^^^

Also clean the ground connections where the battery grounds under the battery tray and at the transmission.
If the ground under the battery is bad then anything that grounds to the body is bad.

Measure the battery voltage with the car running, lights & fan on high.
Should be 14.4 or so.

Measure the battery for AC voltage also.
Should not be much.
 
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