2016 Mazda CX-9: check engine light

Filed Sep 9, 2024 · Electrical, Engine · NC

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The entire electrical system is malfunctioning. All dashboard service lights (check engine, ABS, etc.) illuminate simultaneously, causing the vehicle to stutter and shut off while driving. The vehicle is available for inspection. 2. How was your safety or the safety of others put at risk? This issue has resulted in a dangerous situation, particularly when the vehicle lost power on the highway with my young children aboard. This sudden loss of control could have led to a severe accident. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Mazda’s service department has not been able to reproduce the problem despite multiple visits. I have provided video evidence, but no conclusive diagnosis or resolution has been achieved. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? Mazda’s authorized technicians have inspected the vehicle several times, but no substantial action has been taken. The vehicle has not been inspected by police or insurance representatives. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? All dashboard lights come on simultaneously without prior warning. The symptoms have been random and intermittent over the past few months. Given the ongoing risk, I request an immediate replacement of my vehicle. Please confirm receipt of this complaint and provide a plan for replacement. Thank you for your prompt attention.

Filed Jun 25, 2024 · Engine · 92,000 miles · CA

The contact owns a 2016 Mazda CX-9. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated, and the vehicle started shuddering and overheating. The vehicle was taken to an independent mechanic who diagnosed the vehicle and determined that the failure was related to a cracked head gasket. The vehicle was not repaired. The contact related the failure with the Technical Service Bulletin: 01-03/21; however, the vehicle was not included. The manufacturer was not notified of the failure. The failure mileage was approximately 92,000.

Filed Dec 15, 2023 · Engine · AZ

Engine is leaking coolant. Took the car to Horne Mazda of Avondale dealership for inspection, was told coolant is leaking from cylinder head. Was told the engine overheated and both cylinder head and cylinder block warped and will need to replace the engine. I feel my safety and others were at risk because the car could have lost power and stalled in the middle of roadway at any time due to there was no symptoms of my car engine overheated, car was running as normal, no check engine light, coolant temperature gauge did not show it was overheating, no sign of engine loosing power, no smoke from under the hood, no sweet smell or any indication engine is loosing coolant and overheating while driving. It appears to be a slow leak because coolant reservoir still have coolant above minimum level. First sign of coolant leak was notice during first week of October 2023 when small amount of green fluid was found on garage floor, took car to dealer on Oct.12.2023 for inspection. MazdaUSA refused to cover engine replacement under paid Mazda Extended Confidence warranty (MEC), blaming it's owners fault for operating car while engine overheated and refused to provide written copy of inspection details.

Filed May 11, 2023 · Engine, Transmission · CA

While driving on the freeway in stop and go traffic the engine warning light came on. A few minutes later the data screen stated that I needed to pull over immediately as my engine was overheating. I was on a stretch of the 5 freeway north of Oceanside with no exits for several miles. I pulled over and when the light went off I got back on the freeway to try to make it to an exit. I repeated this process until I was able to exit and pulled in at the first mechanic I came to. The vehicle was losing power at that point. Pulling in and out of the traffic was hazardous to both me and the other drivers. When they inspected my car, they determined that the coolant had been leaking for a significant period of time as demonstrated by the worn spot on the pipe it had landed on. Further inspection revealed a blown head gasket. When a new head gasket was ordered from the local Mazda dealership, the mechanic was surprised to learn that Mazda had four of these parts in stock as most dealerships would have to order the part. The Mazda service department told him that they had four head gaskets in stock because this happens pretty often. My research on this site and on the Mazda forum indicates that this is a known defect to Mazda. This vehicle has just over 56,000 miles on it. It is regularly serviced. There was no warning light prior to this incident, in fact, the blue light indicating the engine was cool had regularly appeared whenever I started the vehicle. I have the replaced head gasket in my possession, should inspection of the part be necessary. I have reported this issue to Mazda but have been advised it is unlikely they will reimburse me.

Filed Jul 15, 2022 · Driver assistance, Engine · TN

On 04/21/22, I took my car to the dealer after noticing antifreeze on our garage floor and a burning smell. NO check engine lights had illuminated. They proceeded to tell me that there was a coolant leak from head/block and cavity leak (something about channel pressure). They also stated this was a casting flaw during manufacturing of the engine. They told me I needed a whole new engine for $8,479.97! Mazda corporate refused to replace the engine at their cost because I had 64,575 miles on it and it was out of powertrain warranty. I called them and asked to speak to a supervisor and never heard from them. I called on 4/26, 4/27, 4/28, 5/4, 5/5 (5 times), 6/9, & 6/20. I finally gave up agreed to pay $7,479.97 (the dealer gave me $1,000 off). I received the car back on 05/20 and it would not start later that day. They towed it back to Mazda and they replaced the crankshaft sensor that was damaged upon install of the new engine. I received it back again on 05/31 and later in the day, the check engine light came on and the automatic braking system engaged while I was driving (thankfully only 40 mph). I managed to pull over in a turn lane before the engine died. I was so thankful I did not make it onto the interstate I was about to enter! Mazda came and picked me up and later got my car. They could not figure out why it was dying and finally got it to recreate it. They replaced another engine sensor and then drove it a lot to make sure it was truly fixed. I finally received my vehicle back on 07/07. I am afraid to take my car out of town and it makes me nervous it will die and automatically start braking again. They KNOW this is a manufacturer issue and they refuse to take responsibility. I am so disappointed in them. This is a huge safety issue. I am also lucky I didn't blow a head gasket before I took it into the shop the first time.

Filed Jul 1, 2022 · Acceleration, Engine · TX

Traveling on the highway going on a road trip. Had vehicle inspected prior and no fuel system problems were noted. I was going 75mph with my family when there was a coasting feeling in the car. I looked and my check engine light popped on and my car immediately would not accelerate and we quickly lost speed. By the grace of God were we able to pull over safely! Code P0132 was the engine code and after an hour, the engine light went back off and we were able to keep a safe speed traveling home. After speaking with a mechanic and dealership, I learned that this was a common problem with the Denso fuel system. My vehicle was not included in a recent recall that included a different year of my vehicle. If manufacturers are aware that a major defect is out there, how many people have to have an accident or potentially cause a huge accident because a car made 2 years prior with the same part from the same manufacturer has the same dangerous problem? It’s ridiculous and I hope you look at this near fatal issue that has effected thousands of people, whose vehicles’ were made in 2017, 2016, 2015 and are not included in the recall.

Filed Aug 17, 2020 · Brakes · 55,000 miles · TX

My wife and daughters took a trip, and on the way home, the engine light came on. When turning on the engine to check the engine light, I noticed that the brake pedal was hard. I was thinking the engine light had to do with the gas cap not being on tight since family purchased gas on the trip back home. I drove the cx-9 to autozone to determine the code for the engine light. The attendant at autozone was unable to register a code. However, I noticed the brakes felt different on the drive to autozone. Although I had to apply more pressure to stop, it took longer to stop. It rolled to a stop. When I got back home, I heard a hissing sound coming from under the dashboard. Mazda's owner's manual regarding the engine light indicates 1.) the fuel tank level being very low, 2.) possible electrical system problem, 3.) emission control problem, or 4.) fuel filler cap is missing or lose. The next morning I drove the cx-9 to see if tightening the gas cap would correct the engine light. During the drive, the braking seemed different. I would press the brake, but the vehicle would roll to a stop instead of stopping. When I was approaching a car stopped at a red light, I had to press the brake very hard to avoid the vehicle. I parked it and called the local mazda dealer. After they performed a diagnostic test, the brake booster was determined to be faulty. I was confused about how a brake booster and an engine light correlates. I'm also trying to understand why the brake system warning light was not activated since this relates to the braking system. After additional research, I'm in complete disbelief that mazda is aware, and it has not decided to address this safety issue. Please take action to have mazda recall the brake boosters to address this issue since it's aware the problem is an equipment/materials issue.

Filed Apr 28, 2020 · Fuel system · 55,000 miles · CT

I just purchased my vehicle about 3 months ago. I was running errands about a week after purchase and was heading home on the highway when the gas notification came on displaying 27 miles left and advised me to get gas. I was about half mile from the exit and the vehicle check engine light came on and it started stalling. Thank fully I was able to get over to the median just in time when it shut down completely. I called roadside and the dealer and explained what happened. I had it towed back to the dealer and they advised me it was because I ran out of gas. I explained it had a quarter of a tank and displayed 27 miles left and it didn't even give me 1 mile to get off the exit. It happened to my husband as well recently and I spoke to a certified mazda dealer and they explained it could be that the gas tank has a dent causing the reading to be off or one of two floats could be damaged and not reading correctly. I was advised this was a common issue with my year but it's not on a recall. I usually get gas when it hits a quarter of a tank but now I'm afraid that I do it at a half a tank. This should be a recall problem as it causes the car to stall immediately which is dangerous. I had kids in my vehicle in an ice storm...I need to have this fixed but it's well over $800.

Filed Jan 14, 2020 · Fuel system · 34,000 miles · NJ

While driving the car in the 287 interstate highway in new jersey, I got the check engine light out of the blue and the car started decelerating in the high speed lane. Luckily I was able to manage and get the car to the road side shoulder. I was not able to start the car after this incident. We had to tow the car to the mazda service center in greenbrook, new jersey. After running the car diagnostics (error code - p0192), they informed me that they had to update the PCM (power control module) software. Thats the only explanation which they gave which made no real sense. They did not provide any information why this issue occurred and what was done to make sure this issue does not occur in the future.

Filed Aug 8, 2018 · Brakes, Driver assistance · 40,000 miles · CA

This incident happened on 31st july, when my wife was driving this car on highway 4 martinez, ca at around 5.00 pm with our daughter (2 years old) returning from daycare. She was driving at approx 60 mile/hr, when the car started giving audio visual warnings on multiple failures and the car started slowing down without responding to the gas pedal and engine propulsion reduced to 'zero'. My wife panicked and was luckily able to pull over on the curb side safely, even though traffic was very high. She stopped the car and turned off the engine and waited for 10 mins and restarted the car multiple times and made sure that no more warnings are displayed, before driving again, however the 'engine warning light' stayed on. After a while she drove home almost 40 miles away very carefully without using any cruise control. Here are the warnings, that came on during this failure, pictures attached. Engine malfunction light. Tire pressure indicator. Stability control indicator. Temperature indictor cruise control failure warning message 'front radar sensor system malfunction' warning message 'forward smart city break malfunction' after a day we dropped the car to mazda dealership for inspection and they found multiple failure codes and they did necessary repair (inspection and repair invoice attached). Even before this incident , we reported multiple times to dealership that the car central information system abruptly shuts down during drive. But they always said that there was no problem. This incident on a freeway was very serious, my family or other drivers could have been in a injury accident because of this issue with mazda.