I have a 1997 ford psd that is giving me a little trouble. Every once in a while I it will crank normally and hit but not start. After that I can crank until the cows come home and it will not start. If I shut it off and retry it will start fine, but I ge a check engine light. I had a local auto parts store do a scan and got the following codes.

P1391 glow plug circuit low input (bank 1)
P1393 glow plug circuit low input (bank 2)

does this just mean I have bad glowplugs in cylinder 1 and 2 or is this something else.

Thanks in advance for any help.

 

this is a california emissions truck. I read in another forum they have something different about the glow plugs.

 

The problem is not in cylinders 1 and 2. The problem would be there is not enough current going to bank 1 and 2. Are the batteries charged fully? I would try to let the GP's warm a bit longer before I started it. If it hits and doesn't start, turn ignition off and back on and let GP's warm for about a minute to a minute and a half then start.

Post back and give results of this.

 

Its sensing an out of range from the gpr to the gp's.
You have to ohm out the wiring from the gpr to/and the gp's.
As neal also states check batt voltage with gp's on.
Test input and output voltage on the gpr.

Bill