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Thread: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault

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  1. 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    Morning,

    Was driving home the other day and my normally extremely reliable 1.9 tdi Jetta decided to throw a bit of a wobbler. I had probably done 70 or 80 miles by this point, but various lights started flashing on the cluster including the glow plug, the oil light and various warnings on the little screen including
    Low Oil Pressure
    Emissions Garage
    STOP!

    I stopped the car and it wouldn't restart. I sat waiting for an hour for breakdown before trying it again and all of a sudden it restarted, so I was able to safely get home. However, I took it for a spin to town yesterday and it did the same thing again. This time I noticed that the car actually doesn't cut out, although it does feel a bit lumpy. Again, it started fine again after a period of being left parked.

    This is what a scan has shown:

    a33a12eb-0e9e-4958-b76e-45be7ef34ccd.jpg

    Will this be as simple as just replacing that sensor?
     
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  2. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    There is nothing simple about changing that sensor, they are a pig! I had this on a DPF BMN engined Golf 5 a few months ago and it was damaged wiring up near the turbo.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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  3. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    Quote Originally Posted by Crasher View Post
    There is nothing simple about changing that sensor, they are a pig! I had this on a DPF BMN engined Golf 5 a few months ago and it was damaged wiring up near the turbo.
    That's not good news at all. Based on the failure case, is it likely to be damaged wiring or the sensor itself?

    Tempted to just take it my local garage tbh. I was hoping it'd be an easy win, I had not taken a look at the actual complexity of replacing it
     
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  4. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    So I've just driven it again paying close attention to the temp gauge.

    Heat is definitely playing a part. The first time it occurred it was at normal running temp, the second time I had been driving for 15 mins.

    Today I watched the temp go all the way to 12 o clock and then it did it again.

    That makes me think sensor over wiring.

    Reasonable jump?
     
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  5. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    It is unusual for the G28 to come up as faulty. We have a Q5 in today from another garage who have fitted a new G28 and it still comes up and it has been to lots of other people including Audi... In this particular case I know that water in the EGR cooler on the back of the head (from an internal leak) causes this code as it upsets the 5V circuit for various sensor of which the G28 is one and the most sensitive; when my tech pulled the plug off there was pink coolant inside the plug.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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  6. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    So I've driven home from work tonight. Happened again... different failure case.

    Whereas this morning it happened just as the temps hit 12 o clock but the car kept running to work... This time the car hit 10 o clock on the temp gauge, the issue occurred and the car died literally while I was doing 30mph.

    I had the heater on full blast and left it for 30 seconds. Car started again but was lumpy as hell and flashing lights all the way home. Luckily only a mile.

    So for time being, it's a kids to school car lol.

    Any thoughts on the above? Is it sounding more like what you describe?
     
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  7. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    Driven it to drop children off at school this morning. Car didn't get fully warm (about 2 miles). Issue didn't occur.
     
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  8. Re: 2008 Jetta 000802 - Engine Speed Sensor (G28) Fault 
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    Does sound like the G28.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

    Slava Ukraini
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