Peugeot 098c - [patched]

I can't find any reliable sources or common references for a model or part called "Peugeot 098c" (or "098C"). Please confirm whether you mean one of these — I'll assume the most likely and give a full review for that unless you correct me:

Section D — Practical knowledge and calculations (20 marks) 13. Given: a common-rail system shows measured rail pressure of 300 bar at idle when the specified nominal rail pressure at idle should be 700 bar. List five possible causes and describe one prioritised test to identify the cause. (8 marks) 14. A DPF differential pressure sensor shows 200 mbar at idle and 1200 mbar under steady highway speed (values hypothetical). Interpret these readings and state whether DPF is likely blocked; recommend immediate action. Show reasoning. (6 marks) 15. Calculate: If a turbocharger produces 0.6 bar boost and atmospheric pressure is 1.0 bar, what is the absolute intake manifold pressure? If the engine’s displacement is 2.0 L and the volumetric efficiency at that boost is 110%, compute the effective air mass entering per intake stroke (assume air density 1.2 kg/m^3 and 4-stroke engine). Show formulas and result. (6 marks) peugeot 098c