Hi, I've already posted on this subject back in April but can't seem to find it.  It won't clear using the software and cable .. in warm weather it appears to clear or when the engine is warm but it comes back again when cold.  I've measured each glow plug and they are all 0.6ohms which, I think, are ok.

Q1- am I right to assume the plugs are good from this measurement?

Q2- where else should I look for the fault if it isn't the plug(s).

 

Thanks

Would it be No2 Cylinder by any chance.

not sure which is No.2 cylinder but ... why do you ask as they are all reading the same?

original post was akin to this ...

 

Quote

 

I got the engine management light come on. So, I bought a cable and software and the fault was .. exactly..

Stored DTC(S)
P0684 - Glow Plug Control Module to PCM Commmunication Circuit Range/Performance

I found a great webiste here ... https://www.obd-codes.com/p0684 which pretty much covered everything ... apart from where all the respective components live??

Anyway ... I reset the code but seeing as the ambient temperature is great today I'm not really surprised the fault hasn't returned. It's got a service due in a month and so I'd really like to sort this myself before then. All the glow plug resistances read 0.6homs or there abouts so I’m guessing this is normal? If not where else could I look?

 

Thanks

Could someone help with the locations of the GPCM, PCM and the solenoid?


Thanks