Expert answer

Hi Juliana,

We don't know of any common issue with the Insight, so it's probably a protection mechanism for the battery. We get a lot of similar queries, which prompted us to write the Why won't my car's stop-start system work? feature - well worth a read.

Expert answer

Hi Janie,

On the parking sensor issue, it just seems to be a bit of a quirk with the Audi Q7 that to get the front sensors on when moving forwards, you have to press the parking sensor switch, although they do, as you point out, come on automatically when you select reverse. We’re not sure why this is, but it might be worth a visit to your dealer to see if there’s some finicky bit of software code that can be re-set to activate them automatically at low speeds.

As for the stop-start system, if could be a few things. Obviously, there may be a fault, in which case get the car booked into your dealer for a check-up. Or it could be that you’re doing a lot of low-mileage, short runs, which aren’t allowing the engine and other systems to get fully up to temperature. Stop-start isn’t a simple on/off system — it’s controlled by the engine management and that won’t let stop-start activate if it thinks that the engine hasn’t warmed up enough (stopping and starting a cold engine can be damaging) or if it has detected that you have a lot of high-energy drain systems (air conditioning, demisters etc) running. Try and analyse your driving the next time you go out and see if any of this fits. If not, head for your dealer. 

Expert answer

Hi Silvester,

We have got so many questions from readers about non-functioning stop-start systems (from all makes and models) that we put together this guide to help you get to the bottom of it:

Why won't my car's stop-start system work?

Expert answer

Hi Tracy,

I'm afraid without knowing exactly which car you have, this is impossible to diagnose. You should bring the car to a good mechanic or auto-electrician.

There are many reasons for a stop-start system to not always work. Read this question and answer on that subject for instance.

Expert answer

Hi Anna,

There are plenty of reasons why a stop-start system won't work in certain circumstances. It's different for every car, but it's well worth reading this other reader question for a general overview, even if it doesn't specifically apply to your car. 

If none of that helps, then pop along to your Peugeot dealer, as the car is still under warranty.

Expert answer

Hi Emma,

I think a hybrid could well suit you, and with your M50-heavy driving (especially in stop-start traffic) it could prove ideal. The IS 300h is indeed a lovely car — beautifully built and good to drive, but you might find that the cabin and boot are on the small side for your family needs. It could be worth looking at the larger GS 300h (same engine, similar real-world economy) or maybe the NX 300h crossover. If you fancy something a bit cheaper, the Prius is always a good choice, as is Kia’s really rather good Niro hybrid.

Read our reviews for more:

Lexus IS reviews

Lexus GS reviews

Lexus NX reviews

Toyota Prius reviews

Kia Niro reviews

Expert answer

Hi Anne Marie,

Stop-start systems on cars will stop working for a variety of reasons, some of them outside your control, but if you think your SEAT still has a problem after looking through this list of possibilities, best bet is to get the car along to your nearest SEAT dealer to check it out:

- Ambient temperature too cold
- Ambient temperature too hot (unlikely in Ireland!)
- Battery in poor condition
- Driver's seat belt usually must be on
- Driver's door and bonnet usually must be closed
- Engine temperature is too low
- Climate control settings may force the engine to stay on

Hope that's of some help. This question by an Audi owner has proven very popular and is mostly applicable to your car too.

Expert answer

Hi Marc,

You've not told us which engine you have so we're going to assume a 2.0 TDI diesel. No matter which version of that engine it is of that age, the change interval is 210,000 kilometres. We'd suggest doing it more frequently if the car is used mostly in urban environments and stop-start traffic.

Expert answer

Hi Rory,

Assuming you really do mean the 1.5 TDCi diesel in the latest Focus (which was only launched in 2015), then Ford recommends every 180,000 kilometres or 10 years. We's suggest earlier if the car is used in town a lot in stop-start traffic. That applies to all 95hp and 120hp versions, as well as the 105hp ECOnetic model.

Expert answer

Hi Stephen,

You've not told us a lot about the car so we've made some assumptions. The earlier versions had a change interval of 120,000 kilometres and the later models were 150,000 kilometres, with the belt tensioner changed every second time in both cases.

As ever, if a car is used in a lot of stop-start, heavy traffic situations, we'd advise drivers to change their belts more frequently than the car makers suggest.