1 Pedal Malfunction

[boltonmackem]

Driving into work today in my 2023 SR RWD Mach E, around 30 mins in to the journey, an error message popped up saying "One Pedal Driving Malfunction. Press brake pedal to reduce speed". I was in whisper mode because of the snow and the one pedal switch had been greyed out. Anyone else had this?

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[kevgallacher]

You shouldn't use one pedal drive in the snow or ice. It is really bad in these conditions and causes the brakes to lock up. The warning probably popped up because the brakes were locking.

Thats great if that is the reason it told you turn it off, it seems very dangerous to have the car in this mode. I think it should actually warn you about that if it detects sub-zero temps and wet/icy conditions.

The best way to drive in these conditions is whisper mode on, one pedal drive off and push the little L Button on the gear selector, it seems to emulate engine braking which is better in icy conditions than using the brake. Also don't use any form of cruise control / blue cruise.

I find this gives the best overall control of the car.

 

[VindictivePantz]

I've experienced this same error a couple of times some time ago and have not received the error since, so assuming it was either some transient software bug that was fixed via one of the OTAs, or specific conditions I've not reproduced through coincidence.

If it's a continual issue, check your OTAs, and contact a dealer.

 

[Art]

Driving into work today in my 2023 SR RWD Mach E, around 30 mins in to the journey, an error message popped up saying "One Pedal Driving Malfunction. Press brake pedal to reduce speed". I was in whisper mode because of the snow and the one pedal switch had been greyed out. Anyone else had this?

I drive with whisper on and one pedal. I have never had that problem.
I do notice that sometimes in starting out I get a surge in accelleration and I have to hit the brakes. After that initial surge all is well. I don't know what causes that surge but be aware of it.

 

[AKgrampy]

There will be quite a bit of push back that 1 PD is not safe on snow and ice. I never use it but many who do have no issues on snow and ice. I believe you should use whatever drive mode you feel safest using.

 

[kevgallacher]

From my experience if you let the foot of the accelerator in heavy snow or ice, you feel the abs kicking in causing the car to slide a bit. You need to push the accelerator slightly to stop the sliding and allow the car to free wheel. The amount of braking it does is too strong for these conditions I guess you could learn to account for this but it’s better just turning it off and using the L gear to slow the car down and using the brakes gently when appropriate. The 1 pedal drive just feels like you aren’t in control of the car and could cause a bad accident if not driven properly. It makes me think of bad drivers who just slam the brakes on when the car slides which is one of the worst things you can do. Driving in bad conditions is not a problem as long as you have proper control of acceleration and braking.

 

[AKgrampy]

From my experience if you let the foot of the accelerator in heavy snow or ice, you feel the abs kicking in causing the car to slide a bit. You need to push the accelerator slightly to stop the sliding and allow the car to free wheel. The amount of braking it does is too strong for these conditions I guess you could learn to account for this but it’s better just turning it off and using the L gear to slow the car down and using the brakes gently when appropriate. The 1 pedal drive just feels like you aren’t in control of the car and could cause a bad accident if not driven properly. It makes me think of bad drivers who just slam the brakes on when the car slides which is one of the worst things you can do. Driving in bad conditions is not a problem as long as you have proper control of acceleration and braking.

You do realize that when you apply brakes that you are entering regen just like 1 PD? I would thing the aggressiveness would depend on the mode. I would also believe a seasoned 1 PD driver would not let of the go pedal completely and cause this kind of issue. Rather they would feather the pedal as they must do during their normal day to day driving. Perhaps I am in la la land but there are several discussions on this subject on the forum supporting continued safe use of 1 PD. I switch between vehicles so keep with 2 PD so I do not make any mistakes (well more than usual) while driving.

 

[kevgallacher]

I guess it’s 20 year of driving ice cars. Driving in snow / ice is always a different experience to normal driving. Keeping your foot in the accelerator pedal when you have to be very gentle with braking just isn’t natural. Each to their own I guess but to me it just seems dangerous to leave just a delicate balance upto the car when it doesn’t seem to tell the difference between an icy road and a dry road. They could tweak the programming to be less aggresive with the brakes in these conditions. But to me just better to turn it off altogether until it all thaws out.

 

[boltonmackem]

Just to let you know that it came back on when i restarted the car and hasnt done it since. Appears to have been something and nothing. I'll keep you posted because I assume it was cold weather/snow related.

 

[GreaseMonkey]

What’s with all the 1pd bashing? I set the car up during delivery on 1pd and intend to sell it that way. Snow, ice, sleet, mud, rain or any other conditions don’t matter. The only drawback is when I rent a shit ice car it seems even more retarded.

 

[cryptk]

I guess it’s 20 year of driving ice cars. Driving in snow / ice is always a different experience to normal driving. Keeping your foot in the accelerator pedal when you have to be very gentle with braking just isn’t natural. Each to their own I guess but to me it just seems dangerous to leave just a delicate balance upto the car when it doesn’t seem to tell the difference between an icy road and a dry road. They could tweak the programming to be less aggresive with the brakes in these conditions. But to me just better to turn it off altogether until it all thaws out.

You aren't leaving the delicate balance up to the car, The amount of braking applied in 1PD is up to the driver, just like it would be if you were in 2PD and using the brake pedal. The only difference is that one of them triggers regenerative braking by letting further off the accelerator and the other mode triggers regenerative braking by placing your foot on the brake pedal.

Unless you are applying the brakes heavily or the final moments when the vehicle comes to a complete stop, the friction brakes don't get used.

I could even make an argument that 1PD is better because I don't have to move my foot between pedals causing a delay in reaction time. You could of course avoid this reaction time delay in 2PD by driving with two feet, but that just goes to show that while the two styles of driving are different, I don't think one is inherently more or less dangerous than the other, assuming that you are used to 1PD.

If you just got your first electric vehicle I wouldn't recommend learning how to use 1PD in the snow or ice, but if you've had it for a while and you're used to it, there's no reason to believe that it's any more dangerous, it's functionally equivalent to using both the accelerator and the brake pedal and the driver is in control at all times (assuming the driver is in control of themselves, lol)

 

[boltonmackem]

What’s with all the 1pd bashing? I set the car up during delivery on 1pd and intend to sell it that way. Snow, ice, sleet, mud, rain or any other conditions don’t matter. The only drawback is when I rent a shit ice car it seems even more retarded.

I love the 1pd (hence my frustrations when it malfunctioned!!) and I have a hell of a job driving my wife’s ICE car!!!

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