Glow Plug fault code

localknoxville

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Hello all
just done a scan on my car and it come up with fault code 4986, so I’m guessing it’s just a simple glow plug replacement then?
no engine management light is on or no glow plug light was on either
car is 2.0TDI on 109500mls and I can’t find anything in the service folder that they have been replaced before
783D1996 098F 4096 B035 CAF8DD159057