2014 Mazda MAZDA6: check engine light

Filed Oct 4, 2025 · Driver assistance, Transmission · CA

At 70000 miles the transmission just got stuck into a single gear in manual. I drove it home and the check engine light came on. Before this problem the car would not go into park. Every time I put it into park I was unable to turn off the car because it thought it was still in gear. I had to fiddle the gear stick. The car also made a high pitch click (metallic) when shifting into 1st or Reverse from park. I took it to Capitol Mazada San Jose and they charged me $7000 to fix some transmission problem. I took it home and the clicking noise did not go away. I took it back to the dealer and they redid some work.

Filed Jan 4, 2024 · Engine · TX

The incident occurred while operating a diligently maintained 2014 Mazda 6 Touring, overseen by dealership service. While driving, the check engine light illuminated, prompting an immediate halt. Upon inspection, a concerning observation was made: the coolant level was significantly low. Despite no apparent leaks, further examination revealed a crack in the cylinder head, allowing coolant to mix with the oil. This issue, specific to Mazda's 2.5L Skyactiv engine, has been identified as a manufacturing defect, independent of overheating. Notably, this problem has been echoed by multiple users, confirming the presence of defective cylinder heads in these vehicles. This flaw necessitates an expensive repair, absolving the vehicle owner of any responsibility. Despite the widespread occurrence of this issue, Mazda has declined to issue a recall for vehicles equipped with these faulty cylinder blocks. Online forums and discussions have highlighted numerous instances of identical cracks in the same location, affirming the prevalence of this problem with Mazda's 2.5L engines. This poses a serious concern for vehicle safety and warrants attention from both Mazda and vehicle owners. Additional information regarding this issue can be found through the provided links. [XXX] [XXX] [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 10, 2023 · Fuel system · 40,000 miles · TX

The contact owns a 2014 Mazda Mazda6. The contact stated that on multiple occasions, the vehicle would stall upon the depression of the accelerator pedal as a fuel odor would emit from the vehicle. The check engine light would also appear on the instrument panel. The vehicle had been taken to an independent mechanic who replaced the fuel line O-ring seal on three separate occasions. The manufacturer nor the dealer had been notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 40,000.

Filed Sep 27, 2019 · Driver assistance, Electrical · 57,000 miles · CO

Engine will stall out while driving vehicle loses all power check engine light comes on battery light comes on traction control light comes on. When engine stalls out and then I lose power steering and brake control and will have to pull over to the side to restart the vehicle. Engine will sputter on start up which sounds like a faulty mass airflow sensor this is a 2014 mazda mazda 6 with 57000 miles

Filed Aug 4, 2019 · Driver assistance, Electrical · 33,000 miles · MD

For seemingly no reason, the vehicle will restart and stall while driving and multiple warning lights will illuminate. This has happened while driving slow, fast and while turning. When this happens, I need to immediately pull over and restart the engine. The check engine light turns on and indicates an abrupt voltage change issue, but soon turns off after a few power cycles. This started to happen more and more often, and more recently, I had the car not able to start as if the battery died. All my electrical components, such as headlights and hazard lights shut off and after about 10 seconds, they all turned back on and running normally. At this point my vehicle started up again just fine. This has nearly caused an accident a couple times and no mechanic has been able to diagnose the issue yet. Although, this issue seems alarmingly close to a recent recall that was announced for 2018-2019 mazdas relating to a software issue that causes unexpected engine stalling relating to the fuel-saving cylinder deactivation technology. Unfortunately, even though my vehicle contains the same technology, it wasn't included on this recall list.

Filed Feb 27, 2016 · Engine, Transmission · 32,600 miles · HI

Upon turning on my car (flat surface, middle of the day, already driven that morning), I received an at failure notice, master warning light, scbs failure notice, and a check engine light. The car had been seen 5 days prior for a routine oil change and inspection. All marks were noted as "green." the engine sounded fine, the shifting of the transmission smooth, and no issues were seen/felt/heard/noticed as of yet. The dealer refused to run a diagnostics test as it is a saturday.

Filed Aug 26, 2015 · Driver assistance, Electrical · 30,000 miles · CA

I was driving down a street @ 40mph when the infotainment, speedometer, shut off and I could not accelerate. The stability control warning came on and stayed on. After a brief moment, the stability warning turned off, but the check engine light went on. The car drove normally for the rest of the day, but the very next day, at a stop light, the same thing occurred, but this time, I could not accelerate past 2000 rpms, nor reach 20 MPH. I pulled over on the side, and turned off the car. Then turned it back on. It drove normally with the check engine light on the rest of the day, but this could be a very dangerous situation.

Filed Jun 29, 2015 · Engine · 24,000 miles · VA

While accelerating on 2 occasions in past 2 months, the engine will lose power without warning. It is still running but will not go faster than about 10 miles an hour. The first time occured while pulling out on a road and almost caused a collision and the second time was on a busy interstate while passing a vehicle and had to coast to the side of the road. The engine light flashes and the stability control light comes on. It will work normally after restarting the engine and it clears the lights. I had it looked at by a mazda dealership the first time and they said it was a cracked spark plug and replaced it. However, the problem just happened again.. Please investigate as this is a significant safety concern!