4.12 PSA HDi – FAP/Eolys, AdBlue ve turbo yağlama birbirinden farklıdır

Research frame

This is a research heading from the source atlas. The heading alone is not OEM service data or a failure-rate claim; model/generation/market identity, official campaigns and measurement evidence remain separate.

Which systems should be separated?

• Evaluate fuel supply, rail target/actual pressure, injector balance, charge-air path and EGR/DPF/SCR in the same event capture.
• A boost fault is not just the turbo; separate leaks, wastegate/VGT, vacuum/electric control, MAF/MAP and exhaust backpressure.
• Do not interpret DPF soot/ash, differential pressure, EGT, NOx, SCR dosing and EGR in isolation.

Evidence collection sequence

1. Capture low-pressure supply, rail target/actual, MAF/MAP, boost and exhaust temperature during crank and load.
2. Compare pressure, temperature, soot load and NOx conversion before/after regeneration in the same drive.

Risk of false generalization

• Without leak and actuator-command verification, a healthy turbo can be replaced unnecessarily.

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