My notes show "P1263 - glow plug #2 control circuit low". From the engine starting perspective in warm weather this is not an issue. However, if the glow plug failure mode is to break off a piece of the ceramic tip, which has been known to happen, that may cause damage to the corresponding piston/valves/turbo as the broken piece passes out of the engine. Of course if the GP broke when the code popped up then the piece is long gone apparently with no harm. Don't want to scare you; I don't have the feeling tip breakage/damage is real common but it has been known to happen.
Not sure how to advise you. Some have driven with the code and no harm. Me personally I'd replace the glow plug like now but 1) that's me; 2) I have Etenoc1 metal plugs in my hot little hands so replacement is not an issue except for the wrench time; and 3) I have other family vehicles if there is no time to do the plug.
_________________ Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs
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