I had to change out my alternator(bent shaft) and belt tensioner yesterday. Today I get in the car to go to a doctors appointment and the cel came on and I took it and had it scanned at two places and it's a p1263 and neither place could tell me what it is. I haven't found much information on it so I'm asking here the best place to get info on out crd's

P1263 - glow plug #2 control circuit low

Two possibilities
1. you have the OEM ceramic glow plugs and #2 has gone bad. Replace it and others ASAP with metal 7v drop in ones from idParts lest bits of ceramic break off and cause internal engine damage on way out.
2. when you changed the alternator you loosened or damaged the wiring/plug to #2 glow plug which is right behind the rear alternator bracket IIRC. Unplug/replug if that doesn't do it check for continuity from glow plug controller to #2 glow plug.

Based on what you just did my $s are on #2

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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

I might just change out the glow plugs just to be safe. It's 159 for all 7v metal plugs an wiring harness better to be safe than sorry. I did find a sticker that said 7v ceramic on the timing cover.

That's not a bad price for 4 7v metal glow plugs and wiring but you will need to add the intake elbow stuff.

Swapping glow plugs 1 (remove alternator), 2 (may be accesible directly or by removal of alternator rear bracket), and 4 (remove fuel filter head) is relatively easy. Pop wiring plug, remove plug with proper size socket. May help to soak base of glow plug in like Pblaster as some have found them stuck pretty tight. Mine and stoutdog's came out easily but both of us are or were low mileage (ca. 50K). The ceramic tips are both brittle and tough in the sense that if you pull them out straight you should have no problem but if you bend them coming out the tips will snap, don't ask.

#3 is a cast iron bit#h to remove mainly because you have to pull the intake elbow and the back bolts are not "quite" impossible to reach. Do yourself a favor either 1) replace the intake elbow bolts studs/nuts/lock washers (any decent parts store) or 2) better yet spring for Weeks101 intake elbow kit.

If you need a how to shot me an email, not a PM

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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