2020 Mazda CX-5: check engine light

Filed Oct 25, 2026 · Brakes, Electrical · IA

Car stalls and 3 warning lights flash on the dashboard- “front radar sensor system malfunction”, “forward smart city brake support malfunction”, “smart brake system malfunction” and check engine light turns on. Car still drives but gas pedal and brake pedal don’t seem to work as well. Have to pull over, turn engine off and restart. Check engine light still on but other warning lights disappear. Check engine light turns off overnight. Has happened twice in the last month. Concerned about safety as gas and brake pedals seem off until turning the engine off and on again. Concerned about brakes failing. When brought to dealership, warning lights had all turned off and dealership found nothing wrong with car.

Filed Apr 8, 2026 · Engine, Fuel system · IA

The car has signs of current recall in other Cx-5 Models. Hesitation with acceleration or driving at high speed, reduced power, not responding appropriately when accelerating or would accelerate on its own, strong smell of gas after the car has been driven and is parked. I know there is currently a recall for a gas pump failure. There is no engine light on.

Filed Feb 19, 2025 · Driver assistance · OH

During snowfall, the front camera becomes obstructed, leading to a malfunction in the smart brake system. When this occurs, an alert appears indicating a “Smart Brake Failure,” accompanied by an audible warning and the illumination of the check engine light. The vehicle then exhibits unpredictable behavior, including unintended braking and sudden acceleration, creating a hazardous driving situation. The only temporary resolution is to restart the vehicle; however, the check engine light remains on for several days before eventually turning off. This issue occurred while I was driving on the highway on February 19, 2025, posing a significant safety risk. This is not the first time the car has done this.

Filed Feb 13, 2025 · Driver assistance, Electrical · MD

Forward Braking Safety Sensor Was on transmission after braking check engine light . Was driving car from work it lost all power . And those warning ⚠️ light indicators where on . Car wouldn't go over 15mph . Took vehicle to mazda and dropped it off as my husband requested information do so . Mazda called say diagnostic saying it needed plugs ,coil packs serpentine belt and adjuster pulleys replacement. I called my husband he's a mechanical engineer he said no way it needs a tune up that early. He requested information go get the car as he flew home from working outta town. We took it to scooter's place certified mechanic in Indian Head md . Scooter's place diagnostic scan said completely the opposite. Say it was the cars brain aka cpu send false signals causing misfire to all components of vehicle . He change one spark plug and car ran normal. He told us it wasn't a fix it was cpu and no matter tune up or not . The computer was the issue. I went back to passport mazda in Suitland Maryland to give them second opinion issues the GM wouldn't give my money back for false diagnostic readings and refused to listen or hear what I had to say I was to upset to continue and decided to leave . He kept saying he wasn't a technician so he doesn't know but was explaining technician issues that were incorrect i have both diagnostic detail paperwork which i will attach with report

Filed Feb 8, 2023 · Engine · TX

Faulty engine coolant thermostat causing cooler than normal range engine. Engine light code P0126