RESOLVED: Depollution faulty with errors P1350, P1351 and P1352

[Finguy]

PROBLEM SOLVED!

Editing original post with follow up of the found reason for these errors to help someone with similar error.

Changed new set of glow plugs for my Citroen C5 2008 2.7HDI. Brand was Denso.

After driving a bit over 500km I got depollution faulty on dash with limp mode and connected Lexia to found out errors P1350, P1351 and P1352.

Removing faults didn't help as they immediately came back up. Run the actuator test and it didn't help, relay didn't click and showed that circuit is open.
Attatched pictures of the data given by Lexia. Faults P1351 and P1352 were with same parameters, P1350 was different.

Removed battery, didn't help. Disconnected wirings from both set of glow plugs with no help.

At this point for some reason took battery off and on again, and run the actuator test once more. Relay was clicking.
Connected one bank of plugs and still clicking, another and it jammed. Had to disconnect battery to get clicking again, didn't just help to disconnect the faulty set.

Found out that one of my new plugs had short circuited.
For some reason it jammed the relay and only disconnecting battery (or relay from ground) helped. Changed this faulty glow plug and now it works without faults.

Nice system, it sees if there's open circuit on ether bank of plugs but jamms if for some reason there is short circuit. Oh the wonders of the PSA...

[ekjdm14]

My take on why the relay sticks on short circuit is that the extra current the shorted plug would draw is causing the relay contacts to arc and "weld" themselves together temporarily.

It's a fault I've had on other types of relay, both automotive and domestic (PIR security light stuck on, give the sensor housing a good rap with a screwdriver and it unstuck! Happened a few times, usually after a bulb failure drawing excess current momentarily).