{"id":304,"date":"2022-10-21T13:40:58","date_gmt":"2022-10-21T13:40:58","guid":{"rendered":"https:\/\/dan.dev.nathanbosch.nl\/?p=304"},"modified":"2023-03-30T08:28:58","modified_gmt":"2023-03-30T06:28:58","slug":"ddtsb-fault-code-p008b-high-pressure-pump","status":"publish","type":"post","link":"https:\/\/www.diagnosedan.com\/nl\/ddtsb-fault-code-p008b-high-pressure-pump\/","title":{"rendered":"PSA\/Opel\/Vauxhall 2014->Fault code stored: P008B"},"content":{"rendered":"
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PSA\/Opel\/Vauxhall 2014-> 1.6 BlueHdi \/ BlueInjection<\/span><\/span>\"\"<\/a><\/h1>

MIL aan. Foutcode opgeslagen:<\/span><\/span><\/h2>

P008B - Brandstofcircuit lage druk: brandstofdruk hoger dan de referentiewaarde<\/h2><\/div>
We krijgen de laatste tijd steeds meer vragen over deze fout, waarbij de oorzaak de terugslagklep in de hogedrukpomp was.<\/span><\/span><\/div>
Er is niet echt veel OE-informatie beschikbaar om te kunnen gebruiken om een meting uit te voeren. Het kan daarom erg lastig zijn om te achterhalen of de storing wordt veroorzaakt door de lagedrukpomp of de terugslagklep in de hogedrukpomp.<\/span><\/span><\/div>
We hebben daarom besloten om een desbetreffend voertuig naar onze eigen werkplaats te halen om een aantal metingen uit te kunnen voeren.<\/span><\/span><\/div>
Pagina 1 van 3.<\/span><\/span><\/div>
\u00a0<\/div>
\u00a0<\/div>

Probleemoplossingsprocedure:<\/span><\/span>\"\"<\/a><\/h3>

Via de parameters in de motorregeleenheid kan met behulp van een scantool de (Lage) brandstofdruk gecontroleerd worden, maar om uit te sluiten dat de sensor foutief meet, is het een goed idee om gelijktijdig een brandstofdrukmeter op het lagedrukcircuit te plaatsen.<\/span><\/span>
Let op: De getoonde druk in de parametermeter lijst wordt weergegeven inclusief atmosferische druk. Dit betekent dat als er 5 Bar word weergegeven in parameterlijst, dit gelijk is aan 4 Bar op de brandstofdruk meter.<\/span><\/span>
Bij een foutloos lagedrukcircuit zie je in de parameterlijst een brandstofdruk van ca. 5 bar en een PWM-signaal van ca. 27% aansturing van de lagedrukpomp (stationair gemeten).<\/span><\/span><\/p>

Controleer het brandstofretourcircuit om te bepalen of de te hoge brandstofdruk in de lage zijde wordt veroorzaakt door de lagedruk- of de hogedrukpomp.<\/span><\/span><\/h3><\/div>

\u2022 Sluit een opvangbak aan op de aansluiting van de retourslang in de motorruimte (pos. 1 op onderstaande foto)
\u2022 Start de motor en laat deze exact 30 seconden stationair draaien<\/p>

Bij een goedwerkend systeem is de retourstroom ca. 500ml.<\/p>

Als de retourstroom aanzienlijk onder de 500 ml ligt, is de storing vaak te wijten aan het feit dat de mechanische retourstroomregelklep van deHogedrukpomp vastzit in de gesloten positie. Dit ventiel bevindt zich intern in de hogedrukpomp en kan niet afzonderlijk worden vervangen. Als de retourstroom ca. 500 ml of meer is het vaak te wijten aan een defecte lagedrukpomp.<\/span><\/p>

\"\"<\/a><\/h3>

Zo vind je een TSB zoals deze in DDTSB:<\/h4>

https:\/\/www.diagnosedan.com\/wp-content\/uploads\/2023\/03\/9001-video-ddtsb-1.mp4<\/a><\/video><\/div><\/p>

Wilt u informatie zoals deze beschikbaar in uw werkplaats?<\/h4>

Ga naar WWW.DDTSB.COM\u00a0<\/a><\/h3><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

21-03-2023. Laatste nieuws van DDTSB<\/p>","protected":false},"author":1,"featured_media":2894,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41,1],"tags":[49,48,42,43,51,47],"class_list":["post-304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newsletter-ddtsb","category-uncategorized","tag-bluehdi","tag-citroen","tag-ddtsb","tag-diagnosedantsb","tag-p008b","tag-peugeot"],"acf":[],"yoast_head":"\nPSA\/Opel\/Vauxhall 2014->Fault code stored: P008B -<\/title>\n<meta name=\"description\" content=\"DDTSB Newsletter. Case study. PSA\/Opel 1.6 BlueHdi \/ BlueInjection. 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