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#31 | |||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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Quote:
Same happened to me this afternoon: engine malfunction warning and limp mode! Pulled over and scanned: DTC P2002C - DPF efficiency below threshold The DPF_LOAD gauge was at 0% and DPF_SOOT_LD at 32%. Some time later after restarting the DPF_LOAD value was 43%. Did some googling and found this interesting forum post, post #4: http://www.thedieselstop.com/forums/...2-code-311269/ The DPF_LOAD value is calculated by the pcm from various input data from the engine management system etc. In other words it's what the pcm thinks it should be. On the other hand DPF_SOOT_LD is inferred from the pressure differential across the DPF. Anyway I took a look at the hoses to the pressure sensor and they were fine. I'll keep driving it as is, on the assumption that there has been a glitch, or else an intermittent sensor/circuit fault. |
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#32 | ||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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Ooops I got DPF_SOOT and DPF_LOAD round the wrong way in my last post.
Though not specifically about Mondeo this text from Fordservice.com is indicative of the sort of strategies used to flag a P002 DTC: 'The DPF Filter Efficiency monitor compares the calculated restriction (from a sensor measuring delta pressure across the DPF) to the expected restriction calculated from a soot model (using various engine sensors as inputs). After a successful regeneration event, the monitor waits for DPF temperatures to fall below a threshold (400 degC, to allow for an accurate soot estimate)and for a small quantity of soot to build up in the DPF (approx 3 grams). At this point, the monitor performs a filtering routine on the calculated restriction (from deltaP sensor) and locks in the initial restriction. Once sufficient soot has built up in the DPF (based on integrated soot from the soot model), the monitor will repeat the filtering routine on the calculated restriction (from deltaP sensor) and from the estimated soot in the DPF (from soot model). The ratio of restrictions (actual vs soot estimate) is compared to a threshold. If the ratio is less than a threshold, an error flag is set. The monitor allows for multiple monitoring sessions in order to provide debouncing before declaring the monitor as a pass or fail. When a sufficient number of sessions have been completed, the monitor is declared complete. The number of sessions with a failed result is compared to a threshold. If the number of failed sessions is greater than a threshold, the monitor is declared as failed and the code is set.' |
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#33 | ||
Regular Member
Join Date: Feb 2016
Location: Goulburn NSW
Posts: 316
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So nearly 20,000km since the DPF problems and all is good. Looks like the vaporiser was the problem. I plan to strip the old one down and clean it out as a ready spare in case of problems in the future.
Rondeo, did you get to the bottom of your issues?
__________________
2012 MC Mondeo LX TDCi Wagon - Highway Hack 392K km and counting - Now gone 😢 2008 Peugeot 308 HDi - Highway Hack II 2008 Citroen C4 HDi - Highway Hack III 2010 Peugeot 308 HDi SW - Shaggin Wagon II 2016 VDJ200R Landcruiser GX Wagon - TTD V8 Power ![]() 2017 Toyota RAV4 GX Wagon - Shopping trolley - Gone 2022 Volvo XC40 T4 Inscription - Shopping trolley II 2002 BMW R1150GS |
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#34 | ||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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P2002 and EML has been a one off so far.
Everything's normal. Could have been a glitch, snag, quirk or hitch. No Idea. After reading your post I bought a 22mm crow foot spanner, just in case. |
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#35 | |||
Jim
Join Date: Jul 2006
Location: Craigmore SA
Posts: 3,650
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Quote:
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The Daily. White 2017 ZG Escape TDCI AWD Wagon The Wifes. Grey 2015 MD Mondeo TCDI Hatch The Old Daily.......2003 Octane BA Taxi Pak Egas Falcon Build Thread |
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#36 | ||
Starter Motor
Join Date: May 2021
Posts: 4
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So I got this error a week ago (MC Mondeo), and eventually managed to force a burn to clear it, and have been monitoring the DPF since. I've noticed the soot load goes up to 80-85% (about 8g) every 150-200km, and has done a few burns by itself since then. Is this about right? By chance I was doing a fair bit of highway driving, but am wondering what happens when doing mostly city driving - when the soot load gets up to high levels?
I've also been monitoring the DPF differential pressure - it changes a bit depending on load, but seems to average around 4kpa, but varies from 0 - 12 when running normally. Have also noticed that the fuel consumption seems to sporadically be higher than normal - I usually run about 5L/100km on the highway, but was up at around 7-8 for a bit, but then dropped back down. This was not during a soot burn btw. Any thoughts? |
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#37 | ||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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Around 80% is the maximum in normal operation, any higher indicates a problem.
A good summary here: https://www.gotboost.co.uk/p244c-for...ostic-testing/ |
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#38 | ||
FF.Com.Au Hardcore
Join Date: Oct 2005
Location: Auckland, NZ
Posts: 1,262
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Interesting thread, this could be the cause of the P2002 DTC on my MB.
Sent from my SM-G980F using Tapatalk
__________________
MB Mondeo TDCi wagon, sea grey, on MAK Invidia 16" wheels. |
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#39 | ||
FF.Com.Au Hardcore
Join Date: Oct 2005
Location: Auckland, NZ
Posts: 1,262
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I'm unable to see all of the PID's referred to in this discussion, for example DPF_LOAD is missing from the list in the FORscan app. All I can find is a PID for differential pressure. Is this because I have a MB and selected MY2007.25 when asked by the app?
Sent from my SM-G980F using Tapatalk
__________________
MB Mondeo TDCi wagon, sea grey, on MAK Invidia 16" wheels. |
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#40 | |||
Regular Member
Join Date: Feb 2016
Location: Goulburn NSW
Posts: 316
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Quote:
__________________
2012 MC Mondeo LX TDCi Wagon - Highway Hack 392K km and counting - Now gone 😢 2008 Peugeot 308 HDi - Highway Hack II 2008 Citroen C4 HDi - Highway Hack III 2010 Peugeot 308 HDi SW - Shaggin Wagon II 2016 VDJ200R Landcruiser GX Wagon - TTD V8 Power ![]() 2017 Toyota RAV4 GX Wagon - Shopping trolley - Gone 2022 Volvo XC40 T4 Inscription - Shopping trolley II 2002 BMW R1150GS |
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#41 | |||
FF.Com.Au Hardcore
Join Date: Oct 2005
Location: Auckland, NZ
Posts: 1,262
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Quote:
I have very few regens occur at low speed, but sometimes notice the engine temp changing while driving, which I expect is a regen. Maybe the vaporiser is only used when the extra fuel alone cannot provide enough heat? Sent from my SM-G980F using Tapatalk
__________________
MB Mondeo TDCi wagon, sea grey, on MAK Invidia 16" wheels. |
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#42 | ||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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Why not take a look?
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#43 | ||
FF.Com.Au Hardcore
Join Date: Oct 2005
Location: Auckland, NZ
Posts: 1,262
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Yes, but I'd need to jack up the front of the car!
I expect Bundybear is right. The vaporiser should not affect engine temperature, which certainly happens on my MB. It looks like they started fitting the vaporiser when the diesel became Euro 5, which happened during 2010. So mine could be either. I tried to check on ETIS but you now need to register as a business to see the vehicle specs, and I couldn't be bothered. Interesting article here: https://www.eltaeurope.com/techassist-fuel-vaporizers/ They are certainly a better way to do a regen than squirting extra fuel into the engine and hoping! Sent from my SM-G980F using Tapatalk
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MB Mondeo TDCi wagon, sea grey, on MAK Invidia 16" wheels. |
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#44 | ||
FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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It's cheaper than the gym anyway.
Jacking the front should only take a few minutes. I use two floor jacks with props and think not much of it. As for removing the undershield a small cordless screwdriver with a 10mm hex drive socket and a picnic blanket from Bunnings. There's plenty to see having done that. |
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