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Thread: Polo 1.2 tdi glow plug light flashing

  1. #1
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    Polo 1.2 tdi glow plug light flashing

    Having used a snap-on ethos edge code reader the following fault was displayed P034100 which relates to camshaft sensor.

    So I have changed the cam belt, water pump and the camshaft sensor but still the glow plug light flashing and the fault 'Camshaft position sensor circuit range/performance' is displayed on the code reader?

    any ideas of what the fault could be?
    Last edited by tdpkp; 18-07-19 at 19:55.

  2. #2
    Administrator Crasher's Avatar
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    A more VAG correct interpretation of that code is

    16725 (P0341) - Camshaft Position Sensor (G40): Implausible Signal

    It means that the pulse the engine computer is seeing does not equate to the signal it is getting from the crankshaft speed sensor. Did you use looking tools to hold the crank and cam?
    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:

  3. #3
    Administrator Keithuk's Avatar
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    First posts normally go in introductions else you could get a free fix and we never see you again!!!

    Snap-on ethos edge code reader adds to many 00.

    VAG Error Code: 16725/000833/6039/4113
    EOBD II Error Code: P0341

    Fault Location:
    Camshaft Position (Hall) Sensor (G40) - Implausible Signal

    Possible Cause:
    Malfunction Indicator Lamp (MIL)(K83) active.

    Wiring/Connector(s).
    Camshaft Position (Hall) Sensor (G40) faulty.
    Timing misaligned.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s)..
    Read Measuring Value Blocks (MVB).
    Check Camshaft Position (Hall) Sensor (G40).
    Check Timing.

    Tech Notes:
    Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.

    When is the code detected?:
    The camshaft position sensor signal sent to the Engine Control Module (ECM) during the first few seconds of engine cranking is out of range.

    Description:
    The Camshaft Position (Hall) Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The Camshaft Position (Hall) Sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor. When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change. When the Crankshaft Position Sensor system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

    When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.

    When the Crankshaft Position Sensor system becomes inoperative, the Camshaft Position (Hall) Sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

    As taken from my new EOBD II Fault Codes Software
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


  4. #4
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    Hi, thanks for your thoughts on this problem.
    The local garage did the work replacing the cam belt & water pump and cam sensor.

    So do you think they fitted these incorrectly?
    2011 Polo 1.2 TDI

  5. #5
    Administrator Keithuk's Avatar
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    Take it back to the garage for checking and a re-scan?
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


  6. #6
    Administrator Crasher's Avatar
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    Get the garage to check the "torsion value" in Measuring Blocks (group 004 zone 4 off the top of my head) and see if it is as close to 0 as possible. If it is either side of +/- 3 this would explain the fault code and show they had not timed it accurately.
    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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