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Old 24-09-13, 05:07 PM   #1
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Default Faults, fix or ignore?

Hi first post here, had the Pug nearly three weeks and stuck on PP2000 today. Hope I'm not being too cheeky, 'cos the car's got a few issues that I'd like some advice on. (I've searched the probs and answers seem to vary a bit). Well here goes:

Perm fault. Pre/Post heating relay circuit. Relay not controlled+spark plug supplied.
(From searching this it's a pretty common issue and is likely to be new glow plugs time? Looks like a bit of a pig to get to them, can't even see them)

Perm fault. Cooling circuit bypass valve solenoid valve circuit. short/circuit between two wires or short/circuit to +ve
(time to resistance check electro-valves controlling butterfly valves in inter-cooler bypass hosing?)

I'm also getting; intermittent faults, Diesel high pressure monitoring flow regulator at stop and monitoring press regulator at stop. Rail pressure too low

It's running fine, mpg in the 50's, bit of smoke at cold startup, bit of soot when flooring it sometimes. I'm just worried that the glowplug prob (+bypass issue) may prevent a regen when required.

Told you it was alot to expect on a 1st post apologies again
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Old 24-09-13, 05:36 PM   #2
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Heating circuit fault. My Xline had it. It was a broken glow plug.
Could also be the heater relay. Plugs are a twat, the heater relay is easy.
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Old 24-09-13, 06:04 PM   #3
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Glow plug fault will definitely stop any regeneration from happening.
Start with the relay as that's much easier to replace.
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Old 24-09-13, 06:21 PM   #4
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Sounds good to me. At least I found the relay, under the ecu. Using planet I managed to get it clicking away. Found only two thick wires, but one's just an earth going to it, the other was green but without a wiring diag it could well be easier (as you say, ta) to just swop it out. What I'm wondering is how does it monitor to know that there's a fault? Does it measure total current to the plugs, 'cos they're series'd up aren't they?
Cheers for the replies btw!
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Old 24-09-13, 06:29 PM   #5
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Do you get any warning lights/ messages on startup?
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Old 24-09-13, 06:37 PM   #6
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No, nothing at all.
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Old 24-09-13, 07:02 PM   #7
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'' it measure total current to the plugs, 'cos they're series'd up aren't they?''
you mean parallel actually don't you..-a buzz bar across the top and one connector at one end or t'other...
that way one goes open circuit the others are still fed with electrickery..lol
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Old 24-09-13, 07:11 PM   #8
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If you can get Planet to show the relay is working properly, it may well not be the problem.
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Old 24-09-13, 07:28 PM   #9
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NeilH, erm, er, can't believe that I actually wrote that. Guess how I earn my living? (Don't answer that) Well, lets just say I should know a whole lot better.
But yes, I did get the relay to click, but haven't managed to check the output yet though. So I'm guessing the ecu can detect low current draw to the (ahem) paralleled plugs?
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Old 24-09-13, 08:58 PM   #10
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Im pretty sure that 407's have a relay that feeds each glowplug individually.
Two thick wires and then four the same.
I think the plug for them is on top of the engine to the left as you look at it.a grey plug with four wires in it.
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