Section B — Technical knowledge (30 marks) 6. Explain the typical operation and purpose of a common-rail diesel fuel system (8 marks). Include a simple labelled diagram (describe labels in words). 7. Describe the function and failure symptoms of a diesel particulate filter (DPF) and outline one safe method to attempt regeneration and one reason forced regeneration may be necessary (8 marks). 8. Explain how turbocharger issues can affect engine performance and list three diagnostic checks you would perform to confirm turbo health (6 marks). 9. Describe the role of the mass airflow (MAF) sensor and how a faulty MAF can impact fuel-air mixture (8 marks).
Diagnostic codes like 098C are generated by the or the Under-bonnet Switching Unit (BSM) . These modules monitor the current draw of each electrical component. If you are experiencing this code, a BSI reset or diagnostic check at a service center may be necessary to clear it or confirm the electrical integrity of the headlamp wiring. peugeot 098c