Intermittent Hesitation on Steady Throttle – C30 1.6 DRIVe
 

2011 car has developed a rare, occasional hestitation, blip, hiccup when travelling on dual carriageways or motorways in 6th on steady throttle at 70-75 mph. Yesterday I had the cruise control on, showing 75 mph, on the South coast dual carriageway. And it sort of hiccuped/v momentary hesitation, three times in a period of about 20 minutes. It has done it before twice, only one hesitation, always in 6th, steady throttle, dual carriageway, within the last 3 months. It feels as though it is getting a tiny moment of fuel starvation. Lasts a second.

Otherwise it is running and has run faultlessly.

It is stop/start but I turn it off immediately I get in the car.

It has a ‘dry’ DPF, with no replacement specified in the Volvo service schedule for the car. I tend to use it for long runs 100 to 200 miles (200 miles today), so the DPF hopefully should get to heat quite often.

I have a second car that I can use for shorter journeys and share my mileage with that car.

What do members think it could be? Anyone ideas with this specific engine?

Background
I am second owner, bought privately from original owner @ 95,000 miles May 2016
Huge history file, every invoice
All Main Dealer serviced, by him and me.
Current Mileage 109,900

Recent Servicing
Oct 2017 @ 105,500 miles
Main Dealer - oil & oil filter, health check, no codes
Self - air filter, fuel filter (Volvo OEM items from Main Dealer)

I HAVE A D3 engine and had the same symtons as you. It was the oxygen sensor on the exhaust manifold.
Code was P1407 egr temp sensor.signal too low