hey guys. I have a 1999 ford f250 7.3 4x4. I use it for my landscaping business and I plow if we ever get a little bit of snow around here where i live which is rare. I was using the truck the other day and the OD light popped on. It didnt blink it just came on. We got about 2 inches of snow and i was doing a couple parking lots that I am contracted to do. When I got onto the highway you could tell it just didnt have the power it usually does. I went home to take a shower and eat before going back out and when I restarted the truck the light was off and all was well. The next day I threw the scanner on it and it pulled P1391 and p1393 bank 1 and 2 glow plug circuit. I purchased a new relay or solenoid and have not put it in yet due to the cold temps hoping to get it in later today. Could that cause the OD light to come on and the truck to run a little sluggish?