2017 Mazda CX-9: check engine light

Filed Jun 5, 2026 · Fuel system · NC

Engine running rough. Check Engine Light illumination. Difficulty starting or a no-start condition. Noticeable loss of power during acceleration Check engine light P0192

Filed Dec 11, 2025 · Steering · MA

The car was jump start due to a bad battery it cold and the light was left on. Right after the jump start a check engine light can on. When I put the vehicle in drive to turn the steering wheel it violently snapped bad and broken one of my finger nail. I tried aging in disbelief it happened aging this shouldn't be happening it could've broke my fingers.

Filed Mar 26, 2025 · Engine, Steering · PA

I was driving the vehicle on the highway when the vehicle started to overheat, lights started blinking, the car was smoking, losing power and acceleration. This car has a recall on the cyclindwr head which when cracks causing the car to loose coolant and oil. If it cracks while you’re driving especially on the highway the car will immediately loose coolant and oil thus causing a very dangerous driving condition. There was no indicator prior to the failure that there was anything wrong with the car. No check engine lights, no coolant lights nothing. Prior to this happening I smelled coolant in the car cabin , took it to my mechanic who tested the coolant system and found no leak. At the time he was unaware of the known issue these cars have with the cylinder head. The problem has been confirmed by Mazda and they notified me within the month of March of the problem and the extended warranty to replace the known manufacturer defect cylinder head. The Mazda dealer now has my car and acknowledges the cracked cylinder head caused the problem but said because I didn’t immediately stop on the highway and kept driving until I got to a safe location I was negligent and are refusing to fix the car which now has a blown engine, etc. it is available for inspection now at the Mazda dealer. My safety was put at risk because I could have died on the highway if the car completely stopped working, it was dangerous driving it when it first started happening because it started out of nowhere the car was fine I was driving 50+ mph and it started smoking, overheating etc. I could have also killed someone else. It is a disgrace that not only they won’t fix my car they want to say they won’t because I’m negligent? I drive my kids to and from school everyday do you think I’m going to risk their safety in an unsafe car? They should not only fix the car but compensate me for putting mine and my children’s lives at risk. A complete disgrace.

Filed Sep 25, 2023 · Fuel system · MA

While driving in normal, operating conditions, the engine cut off and had to pull off to the side of the road. After checking the OBD two error code from the check engine light, there was an error with the fuel pressure rail sensor. Apparently the fuel pump in these vehicles has been failing with regularity on many other models.

Filed Mar 3, 2023 · Driver assistance, Electrical · MD

My vehicle has several issues related to a water pump failure in which the check engine light did not remain on. The vehicle began to over heat and slow down on the highway/ roads despite having my foot on the gas. My vehicle is now at Heritage Mazda Catonsville and unable to be read by the OBD reader which may be related to a weak wiring harness reported by other owners of the CX9. It also my be why my check engine light is not on despite having an engine issue. Many others have reported a failed water pump which caused cracks in the head which causes the car to over heat and slow down without notice. Despite having thousands of customers with this issue Mazda has yet to issue a recall.

Filed Sep 23, 2022 · Engine · LA

Vehicle has only 50k miles and developed a coolant leak which was caused by a crack in the cylinder head. No check engine light or overheating, but this repair will cost was estimated as over $4k. A cracked cylinder head would eventually lead to vehicle overheating which can put driver and passengers in a dangerous situation if vehicle were to overheat while operating as this is a significant engine repair. After dealer technician inspected the part, I was informed that they don't see overheating or poor maintenance as the cause of this issue, but it was caused by the part failing.

Filed Dec 18, 2021 · Engine · MD

2017 Mazda CX 9 signature engine failure at 89,000 miles. July 2021 check engine light came on, this was three months prior to failure. Was told it was a known computer issue and was charged over $200 to fix. November 2021 car started running hot while driving down the road. Red thermostat came on while driving. Was able to get the vehicle to the Mazda dealer that has done routine service on the vehicle. Was told it needed a new engine. Called Mazda customer service and was told it is a known issue with the turbo charge engine. This is a safety risk to myself and others because it could have gave out in traffic.

Filed Mar 13, 2021 · Suspension, Transmission · 33,500 miles · FL

I bought a used 2017 mazda cx-9 from west shore honda in tampa in july of 2020. They screwed me financially and I'll handle that separately. There has been an ongoing issue since the first few days after buying the car. I've complained multiple times via email and phone. I've been trying the service department countless times. They keep stating it's a tire issue. To the point they have replaced the tires 3 times. After the second time I had already decided it's not tires. The car has a very rough ride when I'm motion. Once you got 80 it wobbles. After several weeks the wobble can be felt at lower speeds of 55/60. The check engine light comes on but I'm told there's no codes when they diagnostic the reading. I've expressed that when I pull into my garage within 30 seconds to a minute there's a loud pop it's when the car is not in motion when it's been parked and turned off is when I noticed it. I brought it to my personal mechanic just to look at and drive and he's pretty certain it's a powertrain bearing or something of those sorts. Brought it back to westshore and they put another set of tires on it. This is been going on now for 9 months and after doing research online and some of the federal safety agency ids this is a problem and I do not feel safe. And it needs to be handled the amount of complaints in times that I visited that dealership to fix this problem and all they do is put new tires on it is asinine. I have tons of documentation the same documentation that's at the dealership I do everything via email for that reason.

Filed Jan 29, 2019 · 40,069 miles · MD

After driving for approximately 1 hr, warning message for frint camera and auto brake malfunction illuminated. Power was decreased quickly, not even enough tine to pull off the road. Vehicle was disabled in fast lane of 4 land highway. While waiting for tow truck, after about an hour the vehicle restarted, check engine light was illuminated but vehicle was operating normally. Called mazda dealer to cancel tow and advise I would drive to dealership. Headed to dealership, about 45 minutes away, car did same thing, just cut out leaving me stranded in slow lane of 6 lane highway. Called mazda they arranged tow, after an hour of waiting I tried to restart and it did. Drove rest of way to mazda dealer. They called next day and said that the computer lost communication, they re-flashed the ECM and are going to keep it a day to drive.