Mazda 6 diesel MAF, turbo, electrical doom
Discussion
The 2016 diesel 6 continues to be plagued with power loss and electrical issues original details- https://www.pistonheads.com/gassing/topic.asp?t=19...
The garage changed the MAF as that was the error code, but it’s not fixed the issue, if anything it’s worse!
The turbo won’t kick in until 3k revs, and after some driving the cruise control cuts out and fails, the screen showing which gear is selected goes blank, the stability light comes and stays on and the and the city brake assist stops working. These reset when the car is switched off but fail again after some driving.
I tried disconnecting the battery for a while to try and reset the ECU (desperate times) but sadly it didn’t help.
Any thoughts, guidance very welcome!
The garage changed the MAF as that was the error code, but it’s not fixed the issue, if anything it’s worse!
The turbo won’t kick in until 3k revs, and after some driving the cruise control cuts out and fails, the screen showing which gear is selected goes blank, the stability light comes and stays on and the and the city brake assist stops working. These reset when the car is switched off but fail again after some driving.
I tried disconnecting the battery for a while to try and reset the ECU (desperate times) but sadly it didn’t help.
Any thoughts, guidance very welcome!
stevieturbo said:
Find a competent mechanic
It is likely a wiring/ or water ingress problem somewhere, and it could be relating to a module seemingly unrelated to the engine.
Strange things can happen with modern cars.
Agreed it feels there may be an upcoming car apocalypse as modern cars electrical fail…It is likely a wiring/ or water ingress problem somewhere, and it could be relating to a module seemingly unrelated to the engine.
Strange things can happen with modern cars.
I did have a suspicion the MAF would be to easier a fix and I guess we’ll have to dig deeper 😫
Thanks for your reply
stevieturbo said:
And what has caused multiple control units to fail ? Multiple failures do not happen at random. Such a diagnosis would need some pretty solid evidence.
A fistful of fault codes apparently...the initial engine light was back in July, but came and went and once the MAF was "diagnosed" it took a couple of weeks to come in with no issues. all these new faults have come up post new MAF being installed, so maybe it caused them or was hiding them before. Possum19 said:
A fistful of fault codes apparently...the initial engine light was back in July, but came and went and once the MAF was "diagnosed" it took a couple of weeks to come in with no issues. all these new faults have come up post new MAF being installed, so maybe it caused them or was hiding them before.
The chances of all the modules being faulty....is almsot zero. With no evidence to support the claim, it is a dummy diagnosis.Why can't the turbo be reconditioned?
Mazda don't seem to be able to build an engine that makes it past 100k miles without destroying itself, I wonder if they do it on purpose?
This is a Gen3 6 I think, the Gen 2 had huge and terminal engine issues, both the petrol and diesel versions, as did the Gen 1 petrols (don't know about the diesels that far back).
Mazda don't seem to be able to build an engine that makes it past 100k miles without destroying itself, I wonder if they do it on purpose?
This is a Gen3 6 I think, the Gen 2 had huge and terminal engine issues, both the petrol and diesel versions, as did the Gen 1 petrols (don't know about the diesels that far back).
stevieturbo said:
The chances of all the modules being faulty....is almost zero. With no evidence to support the claim, it is a dummy diagnosis.
The code reader is flagging invalid data for the radar, ECU, power control and anti-lock braking...so they are all over the place! I'm hoping it just s
t it's pants because of the turbo and might be better if it's fixed.Or I just go and buy a new car! Fun and games
Sounds to me like someone who knows these cars needs to check the connectors to all of the modules and do some wire waggling.
I certainly wouldn't be putting any more parts on the car until the random electrical gremlins are solved.
Was the new MAF sensor an OEM part or a pattern part? If the car got worse after it was fitted it could be that the new part is crap or something was disturbed causing an inlet leak.
I certainly wouldn't be putting any more parts on the car until the random electrical gremlins are solved.
Was the new MAF sensor an OEM part or a pattern part? If the car got worse after it was fitted it could be that the new part is crap or something was disturbed causing an inlet leak.
gamefreaks said:
Sounds to me like someone who knows these cars needs to check the connectors to all of the modules and do some wire waggling.
I certainly wouldn't be putting any more parts on the car until the random electrical gremlins are solved.
Was the new MAF sensor an OEM part or a pattern part? If the car got worse after it was fitted it could be that the new part is crap or something was disturbed causing an inlet leak.
Yeah, I agree, spoke with Mazda main dealer and he said similar. the big turbo fault can create lots of reports of failings across the car (almost to make sure the driver is paying attention...) With all the computing power we have I'm always amazed a car can't properly diagnoses itself these days I certainly wouldn't be putting any more parts on the car until the random electrical gremlins are solved.
Was the new MAF sensor an OEM part or a pattern part? If the car got worse after it was fitted it could be that the new part is crap or something was disturbed causing an inlet leak.
Possum19 said:
The code reader is flagging invalid data for the radar, ECU, power control and anti-lock braking...so they are all over the place! I'm hoping it just st it's pants because of the turbo and might be better if it's fixed.
Or I just go and buy a new car! Fun and games
Which exactly why I said earlier it is more likely a comms issue between modules, or one module dragging the system down.t it's pants because of the turbo and might be better if it's fixed.Or I just go and buy a new car! Fun and games
For anyone to say all those modules are faulty and need replaced, is a very stupid diagnosis. Or not a diagnosis at all really, just some fool blindly reading fault codes who has no ability to test.
stevieturbo said:
Which exactly why I said earlier it is more likely a comms issue between modules, or one module dragging the system down.
For anyone to say all those modules are faulty and need replaced, is a very stupid diagnosis. Or not a diagnosis at all really, just some fool blindly reading fault codes who has no ability to test.
yeah that's fair, but I would say I probably wasn't too clear as they did say "broken modules" are what's showing but it could well be other issues with sensors or other parts of the electrics. It's basically having a tantrum!For anyone to say all those modules are faulty and need replaced, is a very stupid diagnosis. Or not a diagnosis at all really, just some fool blindly reading fault codes who has no ability to test.
Possum19 said:
the cruise control cuts out and fails, the screen showing which gear is selected goes blank, the stability light comes and stays on and the and the city brake assist stops working.
All of these would require the car to be reporting its speed/wheel speed correctly to work. I had a 2006 civic, the digital dash went mental reading all sorts of numbers, traction and ABS lights would come on etc - was the speed sensor on the gearbox.
When the ABS sensor (wheel speed) went on my 2013 Mercedes, similar codes - Traction, ABS, Tyre Pressure monitor failure.
Just a suggestion if you're checking sensors - broken wires etc.
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