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Thread: P0101 MAF range performance

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  1. P0101 MAF range performance 
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    Hi everyone.
    I have an Audi A1 sport 2012 1.6tdi. 103k
    Great car bought from new, recently serviced by Audi specialists.
    Noticed the next day that the coil lamp started flashing and eventually the engine light came on.
    No noticeable difference in performance, other than Stop Start doesn't work in this condition.

    I attached my VAG II and got the following codes.

    P0101 Mass or Volume Airflow A circuit range performance
    P0111 Intake Air Temperature Sensor 1 circuit range/performance.

    I removed the MAF sensor and cleaned it using MAF cleaner, thinking that maybe the change of air filter at the service may have dirtied it.
    Seemed ok for 60 miles then came on again, same codes. I decided to change the MAF for new as I have 100K+.Seemed ok again for 60 miles and it came on again.

    Now I have checked the connections, wiring as best I can, connector and terminals are locked and clean, can't see or hear any air leaks in the air intake so I'm puzzled.

    Being a cynic I wondered if the garage that serviced it, did something to get more work, or maybe the fluffy looking air filter is causing a problem.

    One thing I did wonder having read somewhere, the Brake switch is somehow connected to the MAF electrically? today it was ok for 32 miles on my motorway drive as soon as I needed to hit the brakes at speed to slow down the light came on. Now this may be coincidence, but I am wondering if there's something in it. Or could it be the sudden reduction in airflow causing that?

    Anyone else found these codes and resolved them?
     
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  2. Re: P0101 MAF range performance 
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    You need to scan it using VCDS to get a accurate fault code read out most likely it a sensor to with the exhaust or DPF
    eye for an eye means the whole world goes blind
     
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  3. Re: P0101 MAF range performance 
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    Quote Originally Posted by arman123 View Post
    You need to scan it using VCDS to get a accurate fault code read out most likely it a sensor to with the exhaust or DPF
    Hi Thanks for the reply, my VAG ii doesn't give enough information, I know someone with VCDS, will take a look.

    The light was off this morning , I needed to brake sharply on the motorway after 6 miles and it came on, together with the Engine light.

    There's no noticeable effect on the drive.
     
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  4. Re: P0101 MAF range performance 
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    In addition, I just put the VAG ii on and the air inlet temperature seems fixed on 130C, even when the engine is cold.
    Didn't notice that previously as the engine was warm after a run.
    It was 130C then too.

    I'll check it tomorrow with VCDS and see what it reads. But any thoughts on that ?
     
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  5. Re: P0101 MAF range performance 
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    Ok this is what I see on the VCDS.


    01-Engine -- Status: Malfunction 0010
    03-ABS Brakes -- Status: OK 0000
    04-Steering Angle -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- Status: Malfunction 0010
    10-Park/Steer Assist -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    16-Steering wheel -- Status: OK 0000
    17-Instruments -- Status: Malfunction 0010
    19-CAN Gateway -- Status: OK 0000
    25-Immobilizer -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    5F-Information Electr. -- Status: OK 0000

    -------------------------------------------------------------------------------
    Address 01: Engine (J623-CAYC) Labels:. 03L-906-023-CAY.clb
    Part No SW: 03L 906 023 KQ HW: 03L 906 023 KP
    Component: R4 1.6l TDI H63 9978
    Revision: --H63--- Serial number:
    Coding: 00114036032501080000
    Shop #: WSC 00046 790 00000
    ASAM Dataset: EV_ECM16TDI02103L906023KQ 003015
    ROD: EV_ECM16TDI02103L906023KG.rod
    VCID: 7F069776E60555BC61-802A
    3 Faults Found:
    7330 - Mass Air Flow Sensor (G70)
    P0101 00 [101] - Implausible Signal
    Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 166302 km
    Date: 2018.05.18
    Time: 08:35:08
    Engine speed: 1702.25 /min
    Normed load value: 0.0 %
    Vehicle speed: 91 km/h
    Coolant temperature: 87 C
    Intake air temperature: 130 C
    Ambient air pressure: 1010 mbar
    Voltage terminal 30: 14.569 V
    Unlearning counter according OBD: 40
    Air mass: actual value (mg/stroke)-MAF_MES: 513.698 mg/stroke
    Air mass proportion filtered-FAC_MAF_CYL_KGH_RATIO_FIL: 0.77930
    EGR Solen.val.: actual value-ANG_EGRV[0]: 0.000 %
    Throttle valve adapter: actual value-ANG_THR[0]: 95.996 %
    Charge air pressure specified value-MAP_SP_MMV: 1248.07 hPa
    Charge air pressure: actual value-MAP_MMV: 1248.07 hPa
    Engine torque-TQI_SP: 0.00 Nm
    7307 - Intake Air Temp. Sensor (G42)
    P0112 00 [032] - Signal too Low
    Intermittent - Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 18
    Mileage: 166235 km
    Date: 2018.05.17
    Time: 12:32:24
    Engine speed: 0.00 /min
    Normed load value: 0.0 %
    Vehicle speed: 0 km/h
    Coolant temperature: 48 C
    Intake air temperature: 130 C
    Ambient air pressure: 1020 mbar
    Voltage terminal 30: 12.085 V
    Unlearning counter according OBD: 39
    Engine speed: 1270 /min
    Vehicle speed: 52 km/h
    Outside air temperature-Ambient temperature: 18.75 C
    Battery voltage: 14.7 V
    Battery voltage: 14.7 V
    Battery voltage: 14.7 V
    Battery voltage: 14.7 V
    13281 - Intake Air Temp. Sensor (G42)
    P0111 00 [101] - Implausible Signal
    Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 166290 km
    Date: 2018.05.18
    Time: 08:20:57
    Engine speed: 0.00 /min
    Normed load value: 0.0 %
    Vehicle speed: 0 km/h
    Coolant temperature: 12 C
    Intake air temperature: 98 C
    Ambient air pressure: 1010 mbar
    Voltage terminal 30: 11.520 V
    Unlearning counter according OBD: 40
    Coolant temperature: 12 C
    Coolant temperature at radiator outlet: actual value-TCO_2: 10 C
    Fuel temperature-TFU: 13 C
    Sensor for temp after charge air cooler: raw value-TBA_MES: 98 C
    Outside air temperature-Ambient temperature: 10.50 C
    Shut-off timer: last ECM after-run time-T_ES_FCT_DIAG: 0.00 s
    Time since engine start: 0 s


    Address 09: Cent. Elect. (J519) Labels:. 8X0-907-063.clb
    Part No SW: 8X0 907 063 G HW: 8X0 907 063 G
    Component: BCM PQ35 M 110 0655
    Revision: 00110 AE
    Coding: 0E000A2CA805F100201841E00100015443FB6C0A00EF4122DC 0087830041
    Shop #: WSC 00046 000 00000
    VCID: 4084D48AD37BEA4458-8014
    Subsystem 1 - Part No SW: 8K0 955 559 HW: 8K0 955 559
    Component: RLS H04 0003
    Serial number: 20050778
    Coding: 02562D
    Subsystem 2 - Part No: 8X0 951 177
    Component: DWA-Sensor H0 H01 0020
    Subsystem 3 - Part No: 1K0 951 605 C
    Component: LIN BACKUP HO H05 1501
    1 Fault Found:
    00332 - Control Circuit for Tank Flap
    007 - Short to Ground
    Freeze Frame:
    Fault Status: 01100111
    Fault Priority: 4
    Fault Frequency: 18
    Reset counter: 45
    Mileage: 164371 km
    Time Indication: 0
    Date: 2018.04.12
    Time: 09:09:07
    Freeze Frame:
    Term 15 Off
    Voltage: 12.45 V
    OFF
    ON
    Term 50 Off
    OFF
    OFF
     
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  6. Re: P0101 MAF range performance 
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    Digging a bit more,
    3 Wires are on the sensor socket.
    Right pin (not numbered) 5V supply to the Sensor is fine.
    Left pin is ground
    centre pin has very low resistance (to ground), I don't know what it should be but I suspect this is the reason the temp sensor is reading 130C.

    I'm guessing this goes into the control unit.
    So unless there's something in the cables?
    I don't have a tracker to chase the short unfortunately.
    Looks like one for the garage now.
     
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  7. Re: P0101 MAF range performance 
    #7
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    Anyone?
     
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