ONLY WHEN TRUCK IS PLUGGED IN, WITH TEMP BELOW -18 C SO BLOCK HEATER KICKS IN, AND USING THE FACTORY REMOTE START TO START VEHICLE, DOES THIS CODE P1400 COLD START EMISSION REDUCTION SET. AFTER THIS SETS, THEN CODE P0300 ENGINE MISFIRE SETS ALSO. HAS ALL LATEST SOFTWARE CALIBRATIONS IN ECM, BCM, TCM, RCDLR. IF STARTED MANUALLY WITH KEY, ALL WORKS AS INTENDED.
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Since batteries lose almost half their cranking power at freezing, and since diesels require much higher fuel temps to start than gasoline engines, many recommend using a block heater whenever the temperature is under 35-40 degrees if starting becomes a problem.
I`m surprised this didn`t come from the factory with a block heater already installed. if so look for an electrical plug like would be for a house hold lamp, somewhere in the area of the battery. if it didn`t come with one when you buy a block heater the instruction tell you were it is to be installed on the engine and position of element.
The block heater is usually in thesoft plug on the side of the block, or some they just cut the lower radiator hose and it installs with to hose clamps , if the block heater was factory there should be two prongs coming out of one of the soft plugs
DTC P1400 - Differential
Pressure Feedback Electronic (DPFE) sensor signal was below 0.2 volts.
Enabling conditions: Run engine off or running self tests to check this
Blocking Action: This code can block the following monitors: Fuel Control, O2 monitor, catalyst, misfire, and EGR monitor.
Run the engine off and running self tests. If the code does not show
up, it is an intermittent problem. Check for 5 volt reference that is
low, damaged sensor or a short to ground in the signal wiring. Probes
use an EGR position sensor signal which can be low because of a worn EGR
pintle that drops too low in the EGR valve or for a warped EGR valve
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My 05 Malibu has same issue. There is a temp switch in the plug on the block heater cord (raised round plastic protrusion) to prevent the heater working until -18c. I had inadvertently disabled this by replacing the plug on the block heater cord due to no continuity when I tested it (tested it on a warm day before I knew about the switch). However was advised that if I plug in the vehicle on a cold day when the vehicle is hot (example; just arrived at work and it's -20c and want to plug it in for the day) the same fault will occur. Solution. Only plug in after the vehicle has cooled and only when the OAT is below -20c. Not much of a solution, more a of a work around but there it is.
Naaaa.Old wives tales.I grew up in northern NY and back in the day,30 years ago,the climate was much more severe than today.I have seen -40 below up there.Block heaters back then were necessary for especially diesel trucks,as they do NOT like to start in those temps.Gasoline engines with today's fuel injection and computerized engine controls have no need for a block heater as they will fire at the hit of the switch immediately in those temps.Old carbureted cars from 30 years ago normally would NOT fire right up at -40 below WITHOUT a block heater.The only reason i can think to install a block heater is that you will have instant heat when you get in the car.If you are worried about accelerated engine wear because of extreme temps,then by all means install one,or just have a remote start installed,fire the car in the morning and let it warm up 10 minutes at idle before you drive it off.I have a certain relative in N.C. that does this in the summer time.Start the car out in the driveway from inside the house via the remote start,let it run for 10 minutes with the A/C on high to COOL it DOWN,lol.