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  1. #1
    Veteran Member Four Rings Denio24's Avatar
    Join Date
    Jan 24 2013
    AZ Member #
    108156
    Location
    Chicago

    P0100 & P1857 (Mass Air Flow & ABS)

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    I've started reading up on the issue but some time ago my CEL & ABS lighted up, same time, i think. So P1857 is a no communication error... and can be a little tricky to diagnose as it can pertain to many things? I did a scan and turns out I also have P0100. Question is, what could cause these two codes to light up at the same time despite being unrelated? Coincidence? I guess first step to diagnose would be to clean MAF sensor see if it makes a difference and check wiring to MAF sensor. I should also add that the car runs fine.

    Code:
    Address 01: Engine        Labels: 06F-907-115-AXX.lbl
       Part No SW: 8E1 910 115 G    HW: 8E0 907 115 D
       Component: JHM 93STG1 TFSI     0010  
       Revision: 5EH15---    Serial number: XXXXXXXXXXXXXX
       Coding: 0104010A180F0120
       Shop #: WSC 06325 000 00000
       VCID: 2643BDD291DCF90E07-8072
    
    2 Faults Found:
    000256 - Mass Air Flow Sensor (G70) 
                   P0100 - 004 - Supply Voltage - MIL ON
                 Freeze Frame:
                        Fault Status: 11100100
                        Fault Priority: 2
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 192480 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 0 /min
                        Load: 0.0 %
                        Speed: 0.0 km/h
                        Temperature: 21.0°C
                        Temperature: 15.0°C
                        Absolute Pres.: 1000.0 mbar
                        Voltage: 12.065 V
    
    008584 - Bank 1; System too Rich at Idle 
                   P2188 - 008 -  - MIL ON
                 Freeze Frame:
                        Fault Status: 11101000
                        Fault Priority: 2
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 192494 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 739 /min
                        Load: 26.7 %
                        Speed: 0.0 km/h
                        Temperature: 90.0°C
                        Temperature: 9.0°C
                        Absolute Pres.: 1000.0 mbar
                        Voltage: 13.589 V
    
    Readiness: 0000 0100
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-910-517.clb
       Part No SW: 8E0 910 517 J    HW: 8E0 614 517 BH
       Component: ESP8 quattro    H06 0140  
       Revision: 00000000    Serial number: 00000000000000
       Coding: 0004526
       Shop #: WSC 06325 000 00000
       VCID: 2E5345F2B92CB14EFF-807A
    
    1 Fault Found:
    18265 - Load Signal 
                P1857 - 000 - Error Message from ECU
                 Freeze Frame:
                        Fault Status: 01100000
                        Fault Priority: 2
                        Fault Frequency: 61
                        Reset counter: 40
                        Time Indication: 0
    
                 Freeze Frame:
                        Hex Value: 0x0000
                        Hex Value: 0x6222
                        Hex Value: 0x0028
                        Hex Value: 0x0196
                        Hex Value: 0x0001
    
    
    -------------------------------------------------------------------------------
    Garage: 2008 Quartz Gray Audi A4Q 6MT
    Tuning: JHM Tuned Stage 2 93 Octane w/ IE HPFP

  2. #2
    Veteran Member Four Rings Okedokey's Avatar
    Join Date
    Oct 24 2015
    AZ Member #
    363505
    Location
    Perth, WA

    Yeah id check the MAF, it may be malfunctioning causing the voltage issue and therefore the rich conditions...
    A4 B7 2.0T | HPFP upgrade + FMIC | BSR Stage II + exhaust + HFC | 3.0TFSI Throt. Body | RS4 fuel contr., PRV + S3 inj., G247 + DW300c | GFB DV+| 034 RSB + all arms and mounts | S4 brakes | B12 Bilstein suspension + H&R springs | RNS-E + Polk Audio PA D5000.5 - 4 x DB6502 + DB840DVC sub + Pioneer 10" sub | LEDs throughout | 19" Audi 2015 RS4 rims

    My respray thread

  3. #3
    Veteran Member Four Rings Denio24's Avatar
    Join Date
    Jan 24 2013
    AZ Member #
    108156
    Location
    Chicago

    I guess the ABS module monitors the MAF input for air flow for whatever reason. MAF connection was loose. Solved.
    Garage: 2008 Quartz Gray Audi A4Q 6MT
    Tuning: JHM Tuned Stage 2 93 Octane w/ IE HPFP

  4. #4
    Veteran Member Four Rings Okedokey's Avatar
    Join Date
    Oct 24 2015
    AZ Member #
    363505
    Location
    Perth, WA

    Ok cool, well done.
    A4 B7 2.0T | HPFP upgrade + FMIC | BSR Stage II + exhaust + HFC | 3.0TFSI Throt. Body | RS4 fuel contr., PRV + S3 inj., G247 + DW300c | GFB DV+| 034 RSB + all arms and mounts | S4 brakes | B12 Bilstein suspension + H&R springs | RNS-E + Polk Audio PA D5000.5 - 4 x DB6502 + DB840DVC sub + Pioneer 10" sub | LEDs throughout | 19" Audi 2015 RS4 rims

    My respray thread

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