One Pedal Driving

Hi Guys - Newbie
Just bought a MG4 Trophy LR (used). Sometimes the OPD can be toggled on, other times get a message about low charge and the OPD immediately toggles off - charge was over 80% each time this happened. After a few miles I'm then able to turn OPD on. When I purchased the car I was able to turn on OPD on the dealer forecourt - no problem (85% charge). Any one else experienced this? Any ideas what might be causing this?

What I noticed is that when your battery is charge until 100% - the OPD cannot be activated until you're lower than 90%...., I've seen this the two times I went to 100%

PvinSan said:

What I noticed is that when your battery is charge until 100% - the OPD cannot be activated until you're lower than 90%...., I've seen this the two times I went to 100%

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I will check tomorrow how much less than 100% it needs to be (77 kWh ER).

MarWong said:

Hi Guys - Newbie
Just bought a MG4 Trophy LR (used). Sometimes the OPD can be toggled on, other times get a message about low charge and the OPD immediately toggles off - charge was over 80% each time this happened. After a few miles I'm then able to turn OPD on. When I purchased the car I was able to turn on OPD on the dealer forecourt - no problem (85% charge). Any one else experienced this? Any ideas what might be causing this?

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The message you get doesn't make much sense, and should instead tell you the battery charge level is too high to allow OPD.

However it is behaving sensibly when at or near 100% because there is no where for the generated electrical energy to go to at a sufficiently high rate (up to 25% power with OPD). If you get too used to 25% regen braking in day to day use, then one day charge to 100% it could get a bit embarrassing the next time you try to slow down.

I have had a bit of a surprise at 100% charge even without OPD, but for some reason normal regen returned relatively quickly.

Just try and find what charge level it works at by experiment. Note it may vary a bit with temperature.

Thanks Guys
The OPD message was confusing "unavailable, low charge power"

MarWong said:

Thanks Guys
The OPD message was confusing "unavailable, low charge power"

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I too was confused by this but me Trophy ER - which I have now had for 10 days - behaved excellently today in one pedal mode now that the battery charge level is around 75%. I had previously been unable to engage it with 90%+ of charge when preparing for a long run to Kent and then home to Rutland via Norfolk. Incidentally, one top-up on the way using an open to all Tesla charger: cheap and quick- impressive!

Actually, my Trophy ER allowed OPD at 95%, though it could have been 96% as well because I forgot to check. Effectively, that is 3,7 kWh of 'battery space'.

The % seems to vary a bit for different people or perhaps depends on what regen mode you choose initially ?.

For me (using high regen) it's always 89% and below when OPD works.

siteguru said:

OPD is only available for the Phase 2 (MY23) cars - i.e. the ones with the rear wiper.

Allegedly the Phase 1 (MY22) cars aren't compatible with OPD, although I have my doubts about that as we can get pseudo-OPD using ACC - if the vehicle in front stops so do we, without us having to press the brake pedal.

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good morning

Thank you for this.
My wife has Trophy ER, but it was one of the 1st customer ordered ones no rear wiper, and it went for 1st service and full updates including BT, Radio and date fix . I was curious as to why she didnt get OPD, when I took my ER back in Jan to get BT etc fixed and came out with OPD.

siteguru said:

That's something else that MY23 also added - a centre headrest in the rear. The irony being that the area of window swept by the new wiper was obscured by the new headrest.

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When MG announced this, it was the 1st thing I said and when I ordered my ER there was a 4 in the dealers with this setup, to confirm my theory I sat in drivers seat then looked through from the rear of car back in and Hey presto . The sales person did not even notice this till I showed them, so now my ER has the headrest in a plastic bag stored in the loft with MG logo 3d printed covers over the holes where the headrest goes.

I didn't think the ER was around for Phase 1/MY22 cars? I thought it came from the start as a Phase 2/MY23 build? (So including rear wiper and OPD).

siteguru said:

I didn't think the ER was around for Phase 1/MY22 cars? I thought it came from the start as a Phase 2/MY23 build? (So including rear wiper and OPD).

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Well I thought the same, but I suppose not, there must have been an overlap.

siteguru said:

I didn't think the ER was around for Phase 1/MY22 cars? I thought it came from the start as a Phase 2/MY23 build? (So including rear wiper and OPD).

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I ordered my ER when it was announced,( collected late oct 23) and there had already been an announcement that the LR was getting the wiper and at the same time they announced removal of the black roof, didnt realise that it did not include trophy so thought I wasn't getting it. Pleasant surprise when I came to collect and fount it did have black roof

lfc958 said:

I ordered my ER when it was announced,( collected late oct 23) and there had already been an announcement that the LR was getting the wiper and at the same time they announced removal of the black roof, didnt realise that it did not include trophy so thought I wasn't getting it. Pleasant surprise when I came to collect and fount it did have black roof

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Me too (collected earlier this month)! Uncertainty re black roof (dealer didn't seem to know either) was not really an issue as I chose Camden Grey, but it does actually look quite good.

OPD has stopped working. I'm getting the "unavailable, low charge" message despite the fact that the battery is at 30, 50 or 70%. Ambient temp is ~10°C.

Tried multiple times after driving 10km with no result. Any suggestions?

jammamon said:

OPD has stopped working. I'm getting the "unavailable, low charge" message despite the fact that the battery is at 30, 50 or 70%. Ambient temp is ~10C.

Tried multiple times after driving 10km with no result. Any suggestions?

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I would power down the car then remove the negative from the 12V battery, wait a few mins and reconnect. If that doesn't solve it, will be a trip to the dealer.

Is OPD disabled when charge levels are low (<10%) ?

NLMGSAN said:

Is OPD disabled when charge levels are low (<10%) ?

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I think it does when the car goes in "Energy Saviing mode" automatically but this was around 5% for me

Thanks Jonny. I'm still a bit suprized that this happens since it also brings energy back to the battery.
So regeneration in OPD mode at some point is no longer safe for the battery? Would that aldo count for regen 1 or 2?
Or... Does OPD actually drain a bit of energy?

Edit: now I'm confused. This is whst the manual says:

"When the high voltage battery is low on power, a message will appear on the infotainment display, prompting the driver to enable the energy saving mode. When the energy saving mode is enabled, the vehicle will operate on the minimal energy consumption. The power of the air conditioner is limited. The energy regeneration level is automatically adjusted and fixed to "strong". When the energy saving mode is turned off, the energy regeneration returns to the former-selected level. The energy saving mode can be turned on and off on the infotainment display. Energy saving mode cannot be enabled when the vehicle is in Snow Mode."

First, I never activated this mode as far as I know. It was 2 miles from home and there was enough in the battery. So it should not have been active. But even if I'm mistaken and I did activate it, the intention of it is to enable the highest regen mode. If it disables OPD then it means this is not the highest regen mode....!

I can only guess that Energy Saving Mode has been on the car since launch of the MG4, while OPD has only been available on certain models since mid 2023. Perhaps the software / advice will get updated in the next facelift if all cars have OPD then.

JonnyG said:

I can only guess that Energy Saving Mode has been on the car since launch of the MG4, while OPD has only been available on certain models since mid 2023. Perhaps the software / advice will get updated in the next facelift if all cars have OPD then.

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True.
But still, if the car disables OPD to maximize regen, it means OPD is clearly not the most effective way to regen.

I never thought of that because speed reduction when releasing the throttle is absolutely the highest in OPD.