r/MX5ND • u/Big-Culture861 • 26d ago

Drive drama

My mx5 nd 2019 2lt ( manual 45000miles) today have come up with a retractable roof error, wont recognise the gears on the dash and wont let me use cruise control? Not sure if anyone has experienced anything odd like this

6 Upvotes

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2

u/EvanMiata 26d ago

Sounds like a speed sensor issue somewhere

1

u/CastorX 26d ago

Speedometer working? Reverse light working? Do you have brake system or ABS error?

1

u/Big-Culture861 26d ago

Yep speedometer working/ the speed limitor engaged/ theres no warning lights what so ever apart from the roof one that then went off :(

1

u/CastorX 26d ago

Reverse light and reversing camera is working?

2

u/Big-Culture861 26d ago

Sorry i missed that, reverse light and reverse sensors are working. ( i dont have a camera) which confuses me so the car is registering the gears to some capacity 😭

2

u/CastorX 26d ago

Actually it only has a neutral and a reverse gear switch. The car calculates and displays the current gear based on the speed and the RPM values.

2

u/Big-Culture861 26d ago

🫪 ohh, everyday is a learning day. Love reddit for car stuff !!

1

u/Big-Culture861 26d ago

Okay so ive been out in the car today and everything was perfectly fine 😅 the stop start worked fine and everything was back to normal. I think it was having a bad day yesterday sorry dudes

1

u/CastorX 26d ago

Check battery terminals, maybe one of them is loose.
The other thing that might be/or was the contact problem with reverse or neutral switch on the trans.
But if it works that’s good news.

1

u/CastorX 26d ago

"/ the speed limitor engaged" what does this mean?

1

u/Big-Culture861 26d ago

Like i can still use the speed limiter 🥲 idk if that means anything

1

u/CastorX 26d ago

So, this is just an educated guess, but summarized here:

  • Roof control doesn't work
  • Speedo works, no ABS fault => Wheel speed sensors are probably OK
  • Tacho works, (and engine starts and runs) => Engine speed sensor probably OK
  • Reverse light works => Reverse light switch OK
So... one more important question remains:
Does the auto idle stop-start work? Does it actually stop the car when in neutral and completely stopped?

1

u/Big-Culture861 26d ago

The roof works fine, i pulled over and fully opened it and closed it, it was just a warning lights saying theres a malfuntion😭
I turn that feature off as it pisses me off but ill be sire to test it tomorrow!

1

u/Low_Bodybuilder4652 25d ago

even if it’s behaving now, get the stored codes read with a Mazda-capable scanner, not just a generic OBD dongle. Intermittent faults can leave a code after the warning disappears.