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Thread: VW Passat 1.6tdi 2012 Flashing glow plug light

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  1. VW Passat 1.6tdi 2012 Flashing glow plug light 
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    I have a flashing glow plug light come on for last few weeks and car goes in limp mode when it is on. It goes off when I restart the car and comes back on after some times. Some times it doesnt appear for days and sometimes it comes on after few minutes. I have noticed it mainly comes on during cold and wet weather. The car is usually shaking in the morning and I have seen the water levels go down more quicker than usual. I have run a diagnostic and the code is P046C which apparently is EGR related issue.
    Any advise on what this could be and what would be the best way of fixing it? I have been told that cleaning the EGR an fix it? And have been quoted £50 for EGR clean if its at front of engine and significantly more if its at the back. Do I need to clean the unit or just get it cleaned and what are rough costs of replacing it?
     
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  2. Re: VW Passat 1.6tdi 2012 Flashing glow plug light 
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    Fault code: P046C Exhaust Gas Recirculation Sensor "A" Circuit Range/Performance.


    You report that the engine is using coolant as well.
    This could be the EGR cooler leaking into the EGR & being ingested by the engine ( & this also could be the reason for the shaking at start-up ) , but of course could be something else.

    Cleaning the EGR is a waste of time as it takes a lot of time & effort to remove.

    If you havn't had the emissions update, book it in & present the car without the glow light flashing & you may well be able to get a free EGR with the VW "Trust Building Measure"
     
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