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It relates to the pedestrian airbag system, which is a separate system to the cabin airbags. It could be caused by a variety of things, from a front sensor fault to an airbag wiring fault or something else entirely. A diagnostic check should indicate the nature of the fault code generated, and what it relates to.
 

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Discussion Starter · #3 ·
It relates to the pedestrian airbag system, which is a separate system to the cabin airbags. It could be caused by a variety of things, from a front sensor fault to an airbag wiring fault or something else entirely. A diagnostic check should indicate the nature of the fault code generated, and what it relates to.
Thanks for the information.
 

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The connector fault, either in the footwell or behind the glovebox at the CEM connector, is well known and results in numerous spurious warning lamps and messages, as well sometimes as loss of power or the engine cutting out altogether. If the PPM message is the only warning you have, it is almost certain to be a fault in the PPM system, but it is impossible to diagnose what exactly may be causing it without reading the stored fault code(s). A diagnostic check will also reveal whether the problem is likely to be the PPM system or a more general connector issue, because if it is the latter there will probably be several other unconnected fault codes stored as well.
 
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