Our jeep is throwing the etc light, number 2 plug is throwing a code. I'm a bit inclined to leave it as is as It doesn't seem to have any trouble starting and once the jeep is up to running temp you can turn the jeep off then restart it and the etc light goes away.
I've heard a few horror stories about the ceramics, I'm a bit confused as to which glow plugs mine came out with. I'm in Australia and it's an 07 kj liberty.