Peugeot 508 RXH HYBRID4 P1B70

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Homko
Posts: 5
Joined: 21 Aug 2026, 14:19

Peugeot 508 RXH HYBRID4 P1B70

Unread post by Homko »

Hello folks! I have my Peugeot 508 rxh 2012 for about 3y. About 2 months ago one problem started appearing. When I release acceleration pedal the system showed error. I verified that it was P1B70 mostly. And electric motor stopped working until switching off and on again. One guy from the service said that this issue mostly happens when bearings in the differential are old and started destroying so electric clutch is not working properly. I changed bearings, but the oil was good and clean. And the issue remain.

The problem depends on outside temperature, so if it is cold I can go 10km to the school and back without errors. If it is hot it starts appearing in 1-2km. I verified cooling system, everything ok, no air and it actually doesn't depend on cooling system temperature.
Also this error appears if I force reverse movement. So on recuperation forward movement or acceleration reverse movement.

I suspect inverter. On Citroen diagnostic they said I need to change electric motor... But it goes well on acceleration forward so I don't really believe that.

Please help to find out. New electric motor costs a lot to experiment :?
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mickthemaverick
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Joined: 11 May 2019, 17:56
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Re: Peugeot 508 RXH HYBRID4 P1B70

Unread post by mickthemaverick »

After replacing the bearings did you clear the fault codes? :)
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
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Homko
Posts: 5
Joined: 21 Aug 2026, 14:19

Re: Peugeot 508 RXH HYBRID4 P1B70

Unread post by Homko »

mickthemaverick wrote: 08 Oct 2026, 17:41 After replacing the bearings did you clear the fault codes? :)
Sure, and did initialisation. And the situation was the same before changing bearings.
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