2015 Mazda CX-9: check engine light

Filed Aug 14, 2024 · Engine, Fuel system · MD

We have a 2015 Mazda CX-9 Touring with All-Wheel Drive (AWD). The issue that has been happening is a flashing check engine light (CEL) indicator showing up in the gauge cluster. This issue originally started in October of 2023. I was on the highway doing at least 55 miles per hour (mph). Before the light actually came on, I had already felt the vehicle shaking, and also noticed the acceleration was sluggish. In the blink of an eye, the CEL came on and started flashing. After that point, the CEL stayed on. I was able to get to my destination safely. We took the vehicle to a shop, and told the mechanics the issue, but they could not re-create what happened. We stopped driving the vehicle as much after this first encounter. A couple of months later, the issue still persisted, and we took it to another shop. They changed the spark plugs, and the vehicle had been driving CEL-free for several months. Recently, we were going to take the vehicle out for a drive, and noticed the vehicle shaking (before the CEL officially came on) again. The CEL flashed and came on. As of this moment, the CEL pops up and stays on when starting the vehicle. I put in a code reader, and the code that came up was “PO304 Cylinder 4 Misfire Detected.” We are figuring out what our next plan(s) is/are with the vehicle. I looked at some forums for the 2007-2015 Mazda CX-9 Generation, and I noticed that someone mentioned that there was an issue with the injector pigtail wire (one of the fuel injectors). They also mentioned spark plugs and coil plugs. But they still had an issue and it seemed to be not resolved. I'm wondering if this issue could have a direct or indirect connection with the Takata Airbag recall that was issued on August 13th, 2024 with a "Do Not Drive" alert.

Filed Apr 14, 2023 · Engine · CA

My check engine light came on. Thought it was the oil needing to be changed. Oil was extra dark and muggy. Also notice antifreeze low. Fill up antifreeze and change oil. 2 wks later antifreeze back down low. Check engine still on. Got it diagnosed with auto scanner and says camshaft sensor. Went to autoshop, mechanic says it's not cramshaft sensor but water tank leak in engine which was picked up by camshaft sensor. I have yet to find out what else is wrong or if my engine needs to be replaced. For sure the water tank needs replacement. I read from others of their car over heating or completely stopped working. I fear this because I have 3 kids and on weekends I drive on the highway for about an hour to get to my destination. This is something dangerous because I don't want to get rear ended or hurt if my car suddenly gives out during heavy traffic.

Filed Apr 28, 2022 · Engine · MA

2015 Mazda CX-9 with 93k miles: while driving in traffic, check engine light suddenly came on, the car began to shudder as I heard a loud knocking noises coming from under the hood, and then a sudden loss of power while trying to navigate through a busy intersection while trying to make a left turn left myself in danger of almost being struck from the vehicle behind me and an oncoming vehicle from the opposite direction due to me stalling out in the middle of an intersection. The water pump (unbeknownst to myself and apparently many others) is located inside of the engine and behind the timing belt components failed without showing any prior signs of failure due to the water pump being hidden inside of the engine. The coolant had been leaking into the oil pan and mixed with the oil but because the water pump was purposely hidden inside the engine NO leaks of coolant (which would have been the early warning tell-tale sign of a problem) were visible. This faulty design caused a catastrophic failure of my engine which has been verified by a Mazda dealership and the engine had to be replaced at my cost. Although there were no injuries or deaths in my case, it does not nullify a faulty design and component of a vehicle putting peoples safety at risk when it is a well known industry fact that Mazda knowingly continued to manufacture this faulty design and use it in their vehicles.

Filed Apr 18, 2022 · Engine · MA

On December 14, 2015, I bought, a Mazda CX-9, at Sentry West Mazda located at 940 Boston Turnpike, Shrewsbury MA 01545. Unfortunately, the car's engine contains a defect in design, manufacturing, materials and/or workmanship that causes the water pump to suddenly and prematurely fail well-before the end of the useful life of the engine, which leads to catastrophic engine failure or a costly replacement due to the water pump’s inaccessible placement in the engine. On March 7, 2022 while driving the car to the dealer to take care of a Check Engine Warning Light, the car started to shake, all the dashboard lights turned on and the car stopped. My car was immediately towed to the dealer, and hours later I was told that my car needed a new engine. I felt paralyzed with awed when I heard that my 2015 Mazda CX-9, which was just 6 years old with no more than 90,000 miles, needed a new engine. I have been taking this vehicle to the Mazda dealer for all its repairs and maintenance needs, so I can be confident that my family were safe in this car. Unfortunately, this has not been the case. In addition, please note that there is a pending litigation against Mazda for this kind of Engine. Please see more information in this link. https://www.ktmc.com/mazda-water-pump-engine-failure I strongly believe that a car like this is a threaten to the life of anyone driving in and to the people around it. Therefore, I am asking to this organization to take immediately action on this case. Thanks in advance for your attention to this matter, [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Filed Mar 20, 2021 · Engine · 107,300 miles · TX

Engine light came on then my vehicle started over heating and leaking coolant. Vehicle was towed to dealership.after technician diagnosed the problem, I was told it was the internal water pump that caused fluid to mix with the engine oil ruining the engine. I was told I had three options: buy a new engine, buy a used engine or buy a new car. I was told that this was an issue with this year, make and model for several customers. I asked why a recall notice was not given to vehicle owners and was told it was not a safety issue. It would have resulted in an accident if I was on the freeway due to the sudden occurrence of the breakdown. I was driving on a street in traffic. (middle lane)when my car started overheating and shut down. I managed to get it to restart and was barely able to safely pull into a parking lot where I quickly turned it off. I contacted the greenway mazda dealership to report problem and request tow service . Mazda has apparently been aware of this issue for a while.

Filed Oct 6, 2020 · Engine · 84,564 miles · CA

Code p0016 came up one day prior to engine failure. 30 miles after check engine line came up loss power. Upon inspection water pump failure at 85000 miles. Engine most likely toasted

Filed Jan 1, 2020 · Engine · 116,100 miles · GA

While driving my 2015 mazda cx-9 on a very busy interstate, the check engine light appeared on the driver panel. I was traveling with my very young children, ages 4 and 20 months. Approximately 10 miles later, I started hearing a rattling sound under the hood. Shortly thereafter, my car stalled out as I entered my subdivision. My husband had to push the car to our driveway. I called aaa that same day and had the car towed to the dealership that services the vehicle. I was told that the water pump needed to be replaced and was quoted a price to fix the issue. Later, I was told that after further inspection by the dealership that the coolant mixed with fluids and the engine needed to be replaced. I was quoted over $7000 to complete this work. During the course of my research, I have learned that a lot of mazda customers who have this model vehicle experience this issue quite frequently. I called mazda customer care and was told that mazda is not electing to take responsibility for this issue. I was fortunate that I was able to arrive to my subdivision without injuring my children or self, but this is a safety issue that could result in the loss of lives if not corrected immediately.

Filed Dec 17, 2019 · Electrical, Engine · 83,183 miles · MD

Tl* the contact owns a 2015 mazda cx-9. While driving 68-70 MPH, the vehicle stalled. In addition, smoke was detected from the engine and the check engine, battery, and oil warning indicators were illuminated. The vehicle was towed to an independent mechanic who stated that the water pump blew up and coolant entered the engine. The contact called heritage mazda bel air (1800 belair rd, suite c, fallston, md 21047, (410) 575-1351) and was informed that the repairs were not covered under the warranty. The vehicle was not diagnosed or repaired. The manufacturer was contacted and provided reference number: 1-2464193497. The failure mileage was 83,183.