Monthly car tips
Practical guides to diagnostics, buying and maintenance. Read the available edition below.
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Online edition ·
Car tips — October 2026
This edition covers pre-purchase OBD checks, codes that deserve attention and why DPF is not the same as AdBlue.
Zero codes is not a fault-free guarantee
Check readiness, accessible modules and reports before and after a safe test drive. Combine diagnostics with documents and inspection.
Read the guide →A minor code does not guarantee a cheap repair
Symptoms and warning lights change the priority. Read worked examples and what to confirm before negotiating.
Read the guide →DPF, FAP and AdBlue: what each does
Understand the terms before choosing a repair or buying a fluid for your car.
Read the guide →Save the report before clearing and request an independent inspection. This is general guidance, not a diagnosis for an individual vehicle.
