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Thread: Air intake sensor or EGR fault?

  1. #1
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    Air intake sensor or EGR fault?

    koda ocativa 1.6 FSI about 107k had an EGR fault code often every 50- 200 miles. I had an EGR valve replaced with genuine but the fault code still keeps coming at the same mileage interval after clearing it. Some drop in mileage when this happens but i am not completely sure.
    Now it also a G42 sensor fault code which comes with EGR fault code. I had a full scan have only the below faults.

    I wonder if G42 sensor actually is faulty that's why EGR fault code comes up as I already changed the EGR valve?.


    001025 - EGR System P0401 - 002 - Insufficient Flow - MIL ON
    Freeze Frame
    Fault Status: 11100010
    Fault Priority: 0
    Fault Frequency: 16
    Reset counter: 255
    Mileage: 171129 km
    Freeze Frame
    RPM: 2080 /min
    Load: 50.2 %
    Speed: 41.0 km/h
    Temperature: 84.0°C


    000274 - Intake Air Temp. Sensor (G42)
    P0112 - 001 - Signal too Low - Intermittent
    Freeze Frame
    Fault Status: 00100001
    Fault Priority: 0
    Fault Frequency: 95
    Reset counter: 255
    Mileage: 171313 km
    Freeze Frame
    RPM: 3200 /min
    Load: 34.9 %
    Speed: 105.0 km/h
    Temperature: 87.0°C


    Skoda ocativa 1.6 FSI about 107k had an EGR fault code often every 50- 200 miles. I had an EGR valve replaced with genuine but the fault code still keeps coming at the same mileage interval after clearing it.



    Air intake senor fault code comes after EGR fault code.



    I wonder if air intake sensor actually is faulty that's why EGR fault code comes up as I already changed the EGR valve?.
    I am thinking to replace air sensor first, any advice appreciated?

  2. #2
    Administrator Crasher's Avatar
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    Which year and engine type code?
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

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    Quote Originally Posted by Crasher View Post
    Which year and engine type code?
    2007, engine type 1.6 FSI petrol. Code is BLS.

  4. #4
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    Quote Originally Posted by hifiboy View Post
    2007, engine type 1.6 FSI petrol. Code is BLS.
    I meant BLF

  5. #5
    Administrator Crasher's Avatar
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    Funnily enough there is a BLS but that burns the Devils urine.

    My first step would be to check the pipe into the manifold is not blocked, you can see this with the throttle body off and the end gets completely clogged plus it ditches the throttle body.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  6. #6
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    Quote Originally Posted by Crasher View Post
    Funnily enough there is a BLS but that burns the Devils urine.

    My first step would be to check the pipe into the manifold is not blocked, you can see this with the throttle body off and the end gets completely clogged plus it ditches the throttle body.
    I looked under the flap of the throttle body, it does not look like its clogged under it. Also inserted a wire which passed fine with no resistance.throttle body.jpg

  7. #7
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    Also why is air intake sensor Temperature: 87.0°C?. I checked today live temperature was 68 C. Is it normal to have such high temperature when outside is in 20's?

  8. #8
    Administrator Crasher's Avatar
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    The temperature shown is the engine temperature at the point the fault was logged.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

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