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Old 12-05-19, 04:28 PM   #1
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Default Comms unit

I have a faulty comms unit can this cause my car to cut out? It keeps cutting out and losing power.
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Old 12-05-19, 10:02 PM   #2
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No the comm unit has nothing to do with running of engine other than reading the key to allow starting but whatever is causing the engine to cut out COULD be affecting the supply to the comms unit.
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Old 13-05-19, 05:16 AM   #3
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OK thanks it keeps displaying depollution fault but that always displays if there's something wrong. People keep saying it's probably my egr valve or dpf but not sure if my car has a dpf as it's quite old
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Old 13-05-19, 07:55 AM   #4
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You really need to get PP2000/Diagbox on it to help diagnose the fault. Guesswork and Parts Roulette is expensive and frustrating.
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Old 13-05-19, 08:16 AM   #5
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Tell me about it, had loads of repairs on it lately. I have no idea about cars all I know is I need a reliable one so I think I am going to get rid of this one. The garage plugs it in but it comes up with all sorts
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Old 13-05-19, 11:22 AM   #6
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https://www.peugeotforums.com/forums/...gnostic-28190/


https://www.peugeotforums.com/forums/...70/#post529130
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Old 13-05-19, 12:25 PM   #7
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So I've had it plugged in and it's saying an intermident problem with my fuel pressure system.
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Old 13-05-19, 07:16 PM   #8
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If its a diesel the first thing to try is changing the fuel filter
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Old 13-05-19, 07:38 PM   #9
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Apparently it wouldn't be the fuel filter as the engine light wouldn't come on for that so the garage is thinking the fuel sensor
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Old 14-05-19, 06:31 AM   #10
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The garage are wrong a blocked fuel filter often triggers a low fuel pressure fault as the pump cannot suck enough fuel through the filter when engine is under load.

One other known fault is a sticking fuel pressure regulator which often give a high pressure fault. Both of these are more common than sensor failure

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