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2016 F3 non walk home fuse blows

6762 Views 7 Replies 7 Participants Last post by  bigal
2016 Volt, about 32K miles. Trouble free till about a month ago, driving on gas engine power, "reduced propulsion" message appears. No apparent change in the car's behavior or performance. Only thing I did notice was that the engine's electric cooling fan stayed on for several minutes after I turned the car off. This never happened before. Took the car to dealer. They ran diagnostics, found the f3 fuse blown but just replaced it--couldn't find any cause. A month later exact same thing happened when driving using the gas engine. Car's back at the dealer (3 days so far) and they're still looking for the problem. Has anyone experienced similar problem? Any suggestions about what the cause could be would be appreciated
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non walk home?
 

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The Gen 2 manuals label fuse F03 in the engine compartment fuse block as the "Non walk home" fuse.

In the brief thread posted in March of 2016 (https://gm-volt.com/forum/showthread.php?229289-Non-Walk-Home-Fuse-!!!), one post says:

The 15A "Non Walk Home" fuse protects the 12V feed circuits to various engine management and emission devices.
Q44 Engine Oil Pressure Control Solenoid Valve, E41 Engine Coolant Thermostat Heater, Q12 Evaporative Emission Purge Solenoid Valve, Q14 Exhaust Gas Recirculation Valve, B52A Heated Oxygen Sensor 1 are all devices protected by this fuse.

As far as the name it's a bit of a joke but true.
The failure of this fuse will not result in a "walk home" condition
(but surprisingly there's no "Walk Home" fuse!) lol

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Makes me wonder if Teslas have an "Of course I still love you" fuse!
 

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Discussion Starter · #5 ·
2016 Volt, about 32K miles. Trouble free till about a month ago, driving on gas engine power, "reduced propulsion" message appears. No apparent change in the car's behavior or performance. Only thing I did notice was that the engine's electric cooling fan stayed on for several minutes after I turned the car off. This never happened before. Took the car to dealer. They ran diagnostics, found the f3 fuse blown but just replaced it--couldn't find any cause. A month later exact same thing happened when driving using the gas engine. Car's back at the dealer (3 days so far) and they're still looking for the problem. Has anyone experienced similar problem? Any suggestions about what the cause could be would be appreciated
Update 6/25/2020
After being in the dealer's Service Dept for 12 days the concluded that the EGR (Exhaust Gas Re circulation) valve has failed and that causes the short circuit that blows the fuse. Since that's part of the emission control system the will replace it under warranty, BUT the EGR valve is on back order--they estimate a 30 day delivery time. Since almost all of my mileage, particularly during this "stay at home" time is on battery I took the car back and will continue to use it. They assure me that no damage will be done, even if the gas engine runs (other than a blown fuse). So if any of you experience this problem, have the technician test the EGR valve.
 

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Hello dear people. I just bought my 2018 Volt in Romania, Bucharest and im still wondering how this Ufo is working.
The new thing in HOLD mode is that my coolant engine temperature about 115 C (237 F).
In the meantime i have some errors on the highway the check engine button have been appeard : Redcuce Propulsion Power. And after a check test i have this errors:
 

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Update 6/25/2020
After being in the dealer's Service Dept for 12 days the concluded that the EGR (Exhaust Gas Re circulation) valve has failed and that causes the short circuit that blows the fuse. Since that's part of the emission control system the will replace it under warranty, BUT the EGR valve is on back order--they estimate a 30 day delivery time. Since almost all of my mileage, particularly during this "stay at home" time is on battery I took the car back and will continue to use it. They assure me that no damage will be done, even if the gas engine runs (other than a blown fuse). So if any of you experience this problem, have the technician test the EGR valve.
Sorry to resurrect an old one but by any chance did the EGR solve your problem? I am having the exact same thing and I suspected the EGR so I unplugged it and replace the fuse and it hasn't blown the fuse again while the egr's unplugged so I'm suspecting that's it but I just want to make sure there isn't a possibility of a wiring issue. Curious what your results were with the dealership replacing the EGR valve. I'd take it in except my car is out of warranty so if I can just diagnose it and repair it myself I'm okay with that
 

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I am currently having this issue and the dealer has it now informing me that I have "thermostat heater pulling high amperage when commanded on." "Fuse 3 in underwood fuse box open." My questions are, where is the EGR and if you unplug it, does it affect any sensors needed elsewhere or maybe exposes possible future damage to some other system since you won"t, I expect, get any error messages if something is breaking down?
 
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