Mazda 5 Engine Warning Light Advice

[JayL150]

Evening all,

I have a 2012 Mazda 5 Venture Edition with a 1.6L diesel bought in May with just over 104k miles on the clock. Now having done around 10k in the last 4 months a 'power train' warning light occasionally appears briefly under hard acceleration, the light will go off but the engine goes into limp and I have limited power. Annoyingly it first started to appear 3 days after a "full" service at a National Autocentre.

I was in the Highlands and Islands last week and decided to cut the trip short in the interest of getting home and having it looked at. I put it back into the same National for diagnostics and the error codes that came up are fuel related apparently. The description I was given was that one of the mechanics has the same engine in his car and thought it could be the injectors going bad or the fuel filter needing to be replaced. This is the only problem I've had with the car so far and haven't had any real symptoms of the injectors going bad, idle is smooth, doesn't run rough, starts first time and the average mpg is only increasing.

I'll get a second opinion before having any work done and I'll try adding some dpf cleaner and injector cleaners to the fuel as well. Anybody have an experience or knowledge with that warning light or previous experience with National in the same way?

[E-bmw]

JayL150 said:

I put it back into the same National for diagnostics and the error codes that came up are fuel related apparently. The description I was given was that one of the mechanics has the same engine in his car and thought it could be the injectors going bad or the fuel filter needing to be replaced.

You REALLY need to be able to give us the actual fault codes for us to give anything like a diagnosis, can you get back to them & get the actual codes?

Having said that, that is the same engine as in the Fords/Citroens/Volvos/Peugeots & probably others of the same age. I had one in a V40 and the only issues I had with fuel were when injectors failed & on that engine in that car it would "misfire" horrendously & put up ABS/EML/DSC lights & just get slower & slower until it was basically impossible to carry on, but that may be down to the software that Volvo used, so may not give the same results for the same fault.

JayL150 said:

I'll try adding some dpf cleaner and injector cleaners to the fuel as well. Anybody have an experience or knowledge with that warning light or previous experience with National in the same way?

Don't bother, they will do nothing apart from waste money.