Mazda CX-9 This larger SUV adds a V6 option, as well as more cargo room, to the CX-7 option.

This can't be good--multiple warning lights

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Old Dec 11, 2019 | 06:54 PM
  #1  
mlauson's Avatar
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From: Milwaukee WI
Default This can't be good--multiple warning lights

Hi...hoping someone might be able to tell me what might be going on with our car (or at least tell me if it's OK to drive like this--soonest appointment at the dealership a week away!). We have a 2015 AWD Touring CX9 with 90,000 miles that's been great so far, but as of today we have some issues, to whit;
1. Cruise control stopped working (light comes on, but won't engage)
2. TCS off light is on
3. Wheel slippage light is on
4. The wrench light just came on also.

Car seems to be running OK and the manual says to just avoid high speeds for the time being, but I sure have a sinking feeling.

Any ideas? Please help!
 
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Old Dec 15, 2019 | 09:22 AM
  #2  
mlauson's Avatar
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Default Figured it out--PSA!

So the CX9 spent 2 days at the shop and they were unable to figure it out, so I told them to button it up and I'd just have to take it to the dealer next week, hoping to god that we don't do any damage driving it with ominous warning lights.

picked it up and noticed something interesting...whenever I applied the brakes, the parking lights came on, suggesting to me that maybe there was a short somewhere. I replaced the brake light bulbs a few weeks back and just for grims and giggles I pulled one of them out. PROBLEM GONE!!! I looked at the double filament bulb and noticed they were touching. So, shirt circuit in the brake system disabled the cruise, knocked out the TCS system and triggered the malfunction light.

Not sure if anyone else out there ever experienced something like this, but let this be a cautionary tale. OEM bulbs from now on!
 
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Old Dec 21, 2019 | 10:17 PM
  #3  
Mathew KOan's Avatar
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From: Ohio
Default I had the same problem and I think I can help!

Originally Posted by mlauson
Hi...hoping someone might be able to tell me what might be going on with our car (or at least tell me if it's OK to drive like this--soonest appointment at the dealership a week away!). We have a 2015 AWD Touring CX9 with 90,000 miles that's been great so far, but as of today we have some issues, to whit;
1. Cruise control stopped working (light comes on, but won't engage)
2. TCS off light is on
3. Wheel slippage light is on
4. The wrench light just came on also.

Car seems to be running OK and the manual says to just avoid high speeds for the time being, but I sure have a sinking feeling.

Any ideas? Please help!
so I bought a 2012 cx9 grand touring recently like October 2019 and I drove off the lot and the wrench light came on and the other same lights u speak of would randomly turn on and the cruise quit working. I took it to the dealership I bought it from and they replaced the break light switch and it fixed everything. The main problem I had was the cruise didn’t work and when the wrench light came on my throttle would be somewhat unresponsive I would have to let off the gas and hit it again for the car to go. Hope this helps!
 
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Old Dec 24, 2019 | 08:48 PM
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Mathew KOan's Avatar
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Default Break light switch is the fix to all these problems

I had the same issues along with cruise not working and when pressing the gas pedal the throttle was u
responsive until I let off the gas and hit the gas again. Took it back to the dealership I bought it from and they replaced the break light switch $112.00 with parts and labor.
 
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