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HELP! Turbo warning light ==> take to garage immediately OR drive 30 miles @ 70MPH to try to clear?


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#1 ship69

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Posted 25 November 2018 - 11:35 PM

Hello

 

My turbo warning light on my diesel HONDA ACCORD EX I-DTEC has just come on. It is still driving but I think has no turbo.

Should I take the car straight to a garage or try to clear the engine by driving it at high revs e.g. at at least 70mph for say 30 miles? 

 

About 18 months ago, my car had a big problem doing a cleaning cycle to clean the carbon/soot particles out of the DPF.

I am worried about the catalytic converter which I understand is a very expensive thing to replace.

I know that my car had done too many short trips lately and was already over-due for a nice long motorway run to clear the DPF.

 

Cheers

 

J


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#2 F6HAD

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Posted 26 November 2018 - 12:41 AM

Hi, your car doesn’t have a specific warning light for the turbo. Are you referring to the dpf warning light or the engine malfunction light?

In any case the car needs a diagnostic to pull off the trouble codes and determine what the issue is.

If I was a betting man I would suggest it’s a blocked dpf and also possibly a stuck turbo.
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#3 ship69

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Posted 26 November 2018 - 03:02 PM

OK I failed to find any electronic copy of my user manual on-line (thanks honda) but I finally located my own paper manual. And I finally managed to find the icon.

 

Yes, it is called "DPF (Check System)".

 

As I said the DPF has been blocked before, yes the same icon came up, yes I know that I haven't had it on enough longer runs these past few week, and yes of course it's the DPF filter that is blocked. My question is: is there any merit in trying to clear the DPF by taking it on a long run??

 

EDIT:

The local garage just suggested buying some DPF Cleaner fluid to put into the diesel and then going for a 20mile road trip, keeping the revs fairly high (2000 to 3000 rpm). Any thoughts?


Edited by ship69, 26 November 2018 - 03:13 PM.

Honda Accord Tourer (2007), 2.2 litre diesel, i-CTDI
Premier Tuning - Stage 1 (180bhp)

#4 F6HAD

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Posted 26 November 2018 - 03:35 PM

Avoid any chemicals and treatments you’ll make the problem worse. You can try a forced regen although this isn’t a long term solution.

Search the forum, the answers are all here. The upshot is that there are no short cuts really.
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#5 ship69

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Posted 26 November 2018 - 03:44 PM

OK, but I don't understand your reasoning.

If the problem is caused by too many short trips, why wouldn't doing a regeneration help?
Also how and why would chemicals make the problem worse? Either way for some reaons, it did seem to be the best advice of my local garage, so long as there isn't too much fuel in the car at present (there isn't).


Honda Accord Tourer (2007), 2.2 litre diesel, i-CTDI
Premier Tuning - Stage 1 (180bhp)

#6 F6HAD

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Posted 26 November 2018 - 06:24 PM

Because once a dpf is blocked, no amount of forced regens or chemicals will unblock it. The soot hardens and binds itself to the inside of the ceramic cartridge. Sometimes a forced regen can shift what is loose, but at the same time it will harden further what’s already stuck and the heat involved in the process will further harden the soot accumulated on the vanes of your turbo causing that to become blocked eventually.

As for the chemicals they never work and all you’re doing is introducing another element to the mix which can cause problems such as blocking the cat and damaging the differential pressure sensor.

If you trust the advice of your garage, then go for it. All I can do is advise based on substantial experience of working on these cars.. but hey.. what do I know.
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#7 Richard B

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Posted 27 November 2018 - 07:37 AM

What about removing the DPF and physically washing it out?   There are some vids on YT showing people doing this. 

 

I'm not saying you should do this BTW, I'm more curious to know if anyone here has actually has tried this and what the results were.



#8 smokingman

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Posted 27 November 2018 - 08:12 AM

Had a similar issue, had two forced regen by local Honda which lasted about two hundred miles before the light came back on. In the end took car to a Independent Honda garage who removed the DPF sent it away to be cleaned and refitted a few days later-cost £600 with a life time guarantee, just pay for labor to remove/refit. So far covered about 10k miles with no issue. You may try these: https://www.dpfcentr.../find-a-dealer/ seem to have good reviews!

#9 saj

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Posted 27 November 2018 - 11:19 AM

If I was to use an additive for DPF I would use one you spray directly into the DPF like these ones:

 

https://www.carparts...BCABEgJ1J_D_BwE

 

https://www.ebay.co....tm/252485455349

 

https://www.amazon.c...G/dp/B01B9Q5RGA

 

With MOT rules tightening and also all the rubbish we are pumping out into the air we breath and our kids breath, I would stick to keeping the DPF in place and operating and not remove it.  This is my opinion so don't shoot me down.



#10 edgeoftime

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Posted 27 November 2018 - 04:34 PM

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#11 F6HAD

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Posted 28 November 2018 - 01:14 AM

^^ I offer the same. Anyone with the right tools can regen it. Waste of time and money though.
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