Auris Hybrid Poor Engine Performance

That sounds frustrating! My old 2012 Opel Astra diesel had the same symptoms: rough starts, poor mileage, the works. Have you checked for error codes? Mine was a clogged injector. Any black smoke or unusual emissions?

No black smoke, but I noticed a slight increase in emissions during the last inspection. What fixed your Opel Astra?

I tried injector cleaner first, but it didn't really solve it. I eventually replaced the injector. Given the symptoms and potential damage, I'd take it to a trusted workshop for diagnosis and repair.

I took your advice and brought the Auris to a workshop. The injection nozzle was defective, as suspected. The replacement cost 515€. Thanks for sharing your experience; it helped me get a quick fix.