Strange CEL and Code on 08 CRD
My CEL light came on today. The code is ECM P1648. Google tells me it could be a glow plug module, or a bad ground to the module. The jeep starts and runs perfect, no other symptoms. I still have the original battery, could it be on its way out causing other troubles? It hasn't shown any signs of trouble but it is 6 years old and we are very cold for 6 months of the year.
2009 GMC Sierra 3500HD SRW 6.6 Duramax
2008 Grand Cherokee Laredo Mercedes 3.0L CRD