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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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