larryh

You need a scanner to read them. I used this scanner to connect to the OBD II connector: http://www.amazon.com/Elm327-Wirless-Diagnostic-Reader-Scanner/dp/B00AOIM2CC/ref=sr_1_2?ie=UTF8&qid=1389621725&sr=8-2&keywords=elm327 http://www.amazon.com/Version-Bluetooth-Diagnostic-Interface-Scanner/dp/B008UR7J6I/ref=sr_1_4?ie=UTF8&qid=1389621725&sr=8-4&keywords=elm327 The used the following Torque software to read the scanner: http://torque-bhp.com/ Since I don't have an Android phone, I used BlueStacks on my notebook to emulate the Android operating system to run the Torque software: http://www.bluestacks.com/

It usually takes three on/off cycles for the service engine soon light to turn off. Preconditioning the car this morning with the 240 V charger, the coolant temperature reached 38 C, higher than when I used the EBH. When determining the diagnostics, it must determine that the car has no longer been off for three hours once preconditioning starts. Otherwise, that might cause the service engine soon light to come on.

You can see my observations regarding the EBH vs. the heating element for the heater core at: http://www.fordfusionenergiforum.com/topic/1446-cold-weather-observations/?p=10534 http://www.fordfusionenergiforum.com/topic/1614-engine-block-heater-anyone-out-there-have-one/

I updated my post above with some more information since your latest post. You're too quick for me. Mine has come on most of the time I plugged it in for 3 hours.

I was able to read the DTCs from my car. There were 3 of them: P0BCD, P1A18, P1A19. I'm not exactly sure why it is intermittent. I don't get the service engine soon light unless the EBH is plugged in for at least three hours. So I assume that the engine block heater is not warming up the coolant enough to exceed the threshold every time. I have only used the EBH when it is below zero outside. Note that the car must be off for at least three hours before the fault can occur (as described in the document above). Also, the EBH probably warms up the Inverters and controllers since they are near the engine block, but not always enough to inhibit the fault condition. The following are the coolant temperatures that I observed when it was is -2 F (-19 C) last week. I plugged in the EBH four hours before my GO time. The car was outside. The service engine soon light came on. The EBH warmed up the coolant 48 C above the outside temperature. elapsed time temperature degrees Celcius 0:45 14 1:30 22 2:15 26 3:00 29 -- preconditioning started 3:30 31 4:00 30 Preconditioning began 1 hour before the GO Time, or 3 hours after I plugged in the EBH. The car was plugged into the 120 V charger. As usual, preconditioning is useless using the 120 V charger. It just blows cold air even after the EBH heated the coolant to 29 C or 84 F. Preconditioning didn't even warm the coolant temperature above the 30 C reached by the EBH. I should measure what temperature preconditioning brings the coolant temperature up to using the 240 V charger. That does not cause the service engine soon light to come on.

You can find the description of these DTCs (if you can decipher their meaning) at: https://qa2k3.motorcraftservice.com/vdirs/diagnostics/pdf/OBDSM1303_HEV.pdf P1A18 - Variable Voltage Controller Inductor Temperature Sensor CircuitP1A19 - Variable Voltage Controller Driver Temperature Sensor CircuitP0AEE- Drive Motor Inverter Temperature Sensor "A" Circuit Range/PerformanceP0BCD - Generator Inverter Temperature Sensor "A" Circuit Range/Performance According to the link above, P1A18 results from: Inductor temperature differs from ECT > 30 deg C after a 180 min engine off soak time And P1A19 results from: Power Electronics temperature differs from ECT > 30 deg C after 180 min engine off soak time. I assume ECT is Engine Coolant Temperature? So the engine block heater warms up the engine coolant to greater than 30 deg C more than the generator and electric motor controller/inverter temperatures causes these DTCs?

The service engine soon light came on for me after using the engine block heater today. I drove 7 miles to my destination. The light did not come back on when I turned on the car back on.