C4 1.6 HDI semi auto 2013

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auto-tech
New User
Posts: 1
Joined: 24 Jun 2025, 09:30

C4 1.6 HDI semi auto 2013

Unread post by auto-tech »

C4 1.6 HDI semi auto 2013, when the car gets upto 90 degree starts cutting out, throws random errors .i.e. ESP, Gearbox error(even parked in P or N), engine speed syn etc.
I have tried disconnecting the fan but it doesn't make any difference. I have already tried to reset the BCMs by the usual procedure of disconnecting battery and following the process.

When its cold it starts perfectly, drives very smooth, the issue only starts when it gets hot, coolant level seems to be okay,
Any help in the right direction will be much appreciated.
PaulC5
Donor 2024
Posts: 2318
Joined: 06 Jun 2023, 15:26
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Re: C4 1.6 HDI semi auto 2013

Unread post by PaulC5 »

Have you checked the crank shaft sensor ? When failing these can work when cold but once hot stop the engine. Then when cooled down again will allow the engine to start. Eventually they might not work at all. They might not give a fault code since the engine needs to run to give codes. When failed you might not see the engine rpm when tying to start it on the starter. Since these parts do not cost much it is worth trying a new one before paying a garage for a diagnostic.