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PostPosted: Wed Jul 11, 2018 9:35 am 
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Joined: Thu Sep 13, 2012 8:38 pm
Posts: 1352
Location: West Midlands
Car Model: 2007 Derv Dame Vector Sport
I would do, but its 45 miles away and just not practical to get there I'm afraid.
I've booked it in down the road for Friday, they are going to do a forced regen if the DPF isn't too clogged. Will take it from there.
I feel a petrol car coming soon...........

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PostPosted: Thu Jul 12, 2018 1:59 pm 
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Joined: Thu Sep 13, 2012 8:38 pm
Posts: 1352
Location: West Midlands
Car Model: 2007 Derv Dame Vector Sport
Cleared the codes last night, set off to work this morning. About 5 miles in limp mode kicked in. Drove down the M42 and M40 to Banbury in 4th fear, 3K revs. Reset the mpg reading to monitor the regen this way.
Was at 55mpg around the Warwick services, then fell to 52mpg quite quickly. After two mins the power came back. Rapid drive to work.
Left the CEL on to see what happens.
On the way back the limp mode came back. Was doing 80 in the outside lane, dropped back to the middle and kept between 60-70mph.
Stopped at a set of lights and the limp mode went, CEL still on. Another 5 miles of town driving and it is back.
On the drive, read the codes, still P1901 DPF related.

So, it did do a regen and it worked, but then quickly clogged back up again.
Maybe a sensor, maybe the manifold is clogged causing the soot to push through the exhaust.

I’m going to strip the EGR and TB down this evening, see if I can detect anything simple.

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PostPosted: Thu Jul 12, 2018 6:42 pm 
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Joined: Thu Sep 13, 2012 8:38 pm
Posts: 1352
Location: West Midlands
Car Model: 2007 Derv Dame Vector Sport
Interesting.
The TB and intake pipe had the usual oil film but nothing overly mucked up.
EGR looked ok at first inspection, the solenoid pin moves freely, but the actual valve was jammed, only a mm of play to open/close. Cleaned the spring and valve seats and whole unit, moving freely again.
Wondering it the sticking valve would cause the exhaust to over soot, combined with the duff cylinder number four swirl flap.
Checked the swirl actuator and all good.
Put the lot back together after a thorough clean.
Quick test drive and the CEL came back on. Same P1901 code.
Need to get the sub code to track down if it’s just a regen failure or a sensor or more.

I’m not letting this beat me.....

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PostPosted: Tue Jul 17, 2018 3:25 pm 
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Joined: Thu Sep 13, 2012 8:38 pm
Posts: 1352
Location: West Midlands
Car Model: 2007 Derv Dame Vector Sport
Seemingly sorted.....

After the EGR valve “fix” I added a bottle of Redex DPF cleaner to 2/3 of a tank. I’ve done Kettering and back and today Banbury and back the last two days.
CEL came on as I got on the M42 Monday morning, limp mode, but it cleared and returned to full power half way along the A14.
CEL still on during the return journey and again to Banbury. But still no limp mode....phew. Drove back this afternoon and still good, the CEL has turned off. Bonus.

So, the duff swirl flap issue combined with the jammed EGR must have been pushing too much soot through the DPF, the ECU wasn’t able to regen quick enough, hence all the lights and limp modes.
I’ve got my fingers crossed that this has been resolved now.

I did say I wasn’t giving up.

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