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Old 29-03-17, 02:09 PM   #1
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Default P3008, P0409, P0299 EGR stuck open?

I sorted an ESP problem last week by cleaning my EGR, and I also took out the blanking plate, then I got a check engine light yesterday with these faults. Do they make sense to anyone? The faults didn't return immediately after I cleared them. I've got the NCT in a few hours and I don't want to fail over a random check engine light coming on!

I'm guessing that the EGR stuck open there was too much airflow/EGR-flow, and possible losing turbo pressure through the EGR channel/exhaust. Does that make sense?

I might throw the blanking plate back in again. I'd usually go researching myself for a while, but I'm just wondering if anyone can make sense of them quickly for me or seen these errors bunched together before?



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Old 29-03-17, 07:32 PM   #2
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Everybody has the glow plug problem!
It's unclear to me whether it's a red herring or not.
I had it and it was preventing DPF regen so I had new glow plugs, the fault has gone, and all has been well since.

The EGR reports it's actual position back to the ECU -- this is what position copy refers to. If the reported position is too far away from the requested position then aunty polution is summoned.

Flowmeter is the MAF.
If the EGR is open when it should be closed then less fresh air is coming in through the MAF than the ECU is expecting, so this is probably part of the EGR problems.
With this in mind: flow too high is normal when you have blanked the EGR. I have blanked the EGR and have this showing as an intermittent fault. Roughly once every 6 months it will bring on the EML so I just clear it.

Not sure what the turbo pressure thing is on about.
It's saying that the turbo pressure is lower than expected.
Could this also be caused by an EGR that's open when it's supposed to be closed?

I'd put your EGR blank back in!
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Old 29-03-17, 09:22 PM   #3
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Quote:
Originally Posted by rwb View Post
Everybody has the glow plug problem!
It's unclear to me whether it's a red herring or not.
I had it and it was preventing DPF regen so I had new glow plugs, the fault has gone, and all has been well since.

The EGR reports it's actual position back to the ECU -- this is what position copy refers to. If the reported position is too far away from the requested position then aunty polution is summoned.

Flowmeter is the MAF.
If the EGR is open when it should be closed then less fresh air is coming in through the MAF than the ECU is expecting, so this is probably part of the EGR problems.
With this in mind: flow too high is normal when you have blanked the EGR. I have blanked the EGR and have this showing as an intermittent fault. Roughly once every 6 months it will bring on the EML so I just clear it.

Not sure what the turbo pressure thing is on about.
It's saying that the turbo pressure is lower than expected.
Could this also be caused by an EGR that's open when it's supposed to be closed?

I'd put your EGR blank back in!
Nice one, yea that makes sense alright.
I threw the blanking plate back in earlier, I only had it out for a few days, after cleaning the EGR last week. I drove ~60 miles to the NCT and back and no engine lights, haven't checked with PP2000 yet though.
I wouldn't be too bothered about the glow plugs since the prev owner has the DPF removed, or so he said... it's one of the few things I haven't taken apart yet, but I'll check it out some day when I'm bored!

Indeed, I don't like the idea of a stuck-open EGR. Turbo pressure going straight out the exhaust at high air pressure, and manky crap coming in at low pressure?

A few fault codes every now and again I can live with. I had the aunty pollutant fault last week alright, after updating my ecu to 5200, but when I threw on a remapped version it went away again (egr,dpf off) .
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Old 08-04-17, 06:51 PM   #4
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So these fault 4 faults above keep coming back even with the EGR blanked off again. Once wiped, the come back after ~70-80 miles. I got the engine management light at the exact same spot on the road, twice which was weird, right at the top of this one hill. Maybe the lower pressure kicks it over the edge..

It does seem to be a low pressure issue, but what's the deal with the "Turbocharger position reference value" in the pic below, is that normal?

Does anyone see an obvious problem when looking at these values?

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