406oc.co.uk

Hi,

I'm after a bit of advice regarding glow plugs on a 2001 hdi (90).
I had a permanent Post Heat fault being registered and car going into limp mode.

I was told it was either Relay, coolant sensor or glow plugs. The relay and coolant sensor were replaced but the fault
remained. On Monday I bought a set of glow plugs from Halfrauds store and got our local Halfrauds service centre to
fit them.

Woooohoooo the fault cleared and car running normally.

Thursday morning, leaves work and gets about 2 miles and car goes into limp mode again.

Is it possible the glow plugs have failed or another fault causing the plugs to fail. Can't get to a diagnostics
machine until next week.

I noticed the plug nearest the air filter was loose, finger loose. Have tightened this but not made any difference.

Thanks for any advice

limp mode . engine management light will be on ?

its daft guessing at what it could be really. changing relay and coolant sensor when they could have been perfectly ok ..

the money replacing them in my view should have gone on a diagnostic first. i know you said you cant get to 1 till next week but you should have waitied really.

but it was worth a try supose if it wasnt to expensive.

next step needs a diagnostic test , this should pin point the fault

Hi,

The relay and sensor were replaced after the original diagnostics at Peugeot. They didn't give me the code
just said it was a Post heat fault. Peugeot said the possible faults were either the relay, sensor and glow
plugs. The relay was new but from ebay, was advertised as for a Toyota, the pic showed part number,
this matched the part on the 406, got this for £10 inc postage, absolute bargain.
The sensor was £18 from Peugeot with the new O ring. That's why these were replaced 1st, started with the
cheapest parts and worked my way up in price.

Hi again,

Diagnostics done today, came back with error permanent error P1352

Raplaced the Glow Plugs again - did all 4 for good measure.

These are what I removed - These have done 200 miles from new - whats the best way to test them, also
any idea what to check that caused them to fail so quickly

to test just get a 12v battery and attach jump leads touch the positive to the nut on the top and clamp the neg to the body of the plug.the plug should glow red ,if it dosnt its had it.
ps dont touch the red bit

A quick update - Advice still needed as where to go now

Have done 480 miles on yet another set of new glow plugs from Halfords (They replaced last set) and have failed again.
Fault P1352

Got a new set from EuroCarparts, this time they are Beru. Fault cleared immediately. Could it be a faulty batch from Halfords or should I check anything else on the car.

Thanks for any advice given.