2015 Mazda CX-5: check engine light

Filed Aug 1, 2024 · Engine, Fuel system · VA

While driving on the freeway the check engine light came on. I was able to drive the car home the remaining 20 minutes but there was some noticeable difficulty accelerating. When I went to turn on the car later that day the engine would not turn over and there was an audible rattling/chugging sound and the car itself shook. I was unable to get the car to start and the check engine light remained on. I had AAA check the battery the next day and confirm it was not a battery issue and a diagnostic revealed the P0192 code. AAA towed it to their shop where it was confirmed by the manager mechanic that the issue was with the high pressure fuel pump and that it was causing an issue with the low pressure fuel sensor as well. The mechanic was unable to determine what caused the pump to fail and has quoted me nearly $2000 to fix it. After some searching online it has become clear that this is an issue many other Mazda owners have faced and that is even a recall for the pump for years and makes from Mazda due to a known issue with DENSO fuel pumps causing this exact issue. Despite this being known and DENSO having admitted issue with fuel pumps in cars dating back to 2013, Mazda has not recalled the vast majority of the cars that could be affected. From information I've gathered, it is entirely possible that my vehicle could have just stopped running in the middle of the freeway due to this issue which obviously would have put me in great danger of an accident. To summarize: Low pressure fuel sensor and high pressure fuel pump with error code P0192 are cited as the issues. It's possible this issue can cause the car to stop running with no warning, which would be extremely dangerous especially on the freeway. The problem has been reproduced and confirmed by a AAA mechanic shop. The vehicle has been inspected by the AAA mechanic but no others. The check engine light came on but was not clear how extreme the circumstance was.

Filed Feb 16, 2023 · Brakes · IL

On Feb. 9, 2023, I started my vehicle and lots of warning indicators lit up the dash of my well-maintained vehicle. Check Engine, ABS, TPMS, SBCS to name some of the warning lights. When I took my car to the dealer, they told me the left front wheel speed sensor had mechanical failure and would need to be replaced. Said the car's antilock brakes wouldn't work without it being replaced. My car also has the automatic brakes to prevent collision and stability control systems which are dependent on wheel speed sensors' function. My vehicle mileage was 59307 when I took it to the dealer. Over $600 repair bill.

Filed Dec 8, 2020 · 61,000 miles · GA

The check engine light came on and the vehicle has 61,000 miles. The dealership determined that a new heater core is needed and there have been several service bulletins issued on this part. The error code showed po11a. The dealership wants to charge $2,367.00 to replace the heater core. Mazda corporate was contacted and since the vehicle is out of warranty they are not will to assist in any way. The reference number for this complaint is 1-3153481645. The technical service bulletin said the average mileage this occurs is 39,029 miles. I realize this may not be a safety issue but this is something mazda should stand behind. There is no accident or injury associated with this. There should be a recall if the part fails this early in the life of the vehicle.

Filed Oct 10, 2017 · 35,850 miles · CO

We were driving across wyoming on the interstate with the cruise control on at 75mph. Suddenly there was a violent shake in the car like the engine was locking up. We tried to pull off the highway and it did it again as we were pulling over. When we got the car stopped the check engine light was on and a message on the display that engine diagnostics were required. I called the dealer in ft collins co and my dealer in denver but they said they could not tell me what to do. I drove the car back to denver very slowly with the check engine and warning message on the dash and it ran okay. My dealer could not look at it for a week and when I took it in the warning lights had gone off. The dealer said there were no codes and nothing they could find wrong. I called mazda and they had me take it to another dealer and again there were no codes for it. We are scared to drive the car. It has sat in our garage the past couple months except for the trips to the dealer. If we had been in traffic I think we would have caused an accident.

Filed Aug 20, 2015 · Electrical · 14,000 miles · WI

Driving on hwy 41 going south from racine into chicago area late morning, my son in law was driving going about 55. All the lights on the dash went on! Every single one was lit up so he pulled to the side of the road and the car would not shut off, the electrical system was just frozen, things that were on stayed on and the things that had been off would not go on. After approximately 30 of sitting at the side of the road waiting for assistance (it was over 90 degrees that day) I was finally able to shut the car off. After consulting with a mechanic via phone I started the car. It started right up and the only light on was check engine. We drove to our destination, parked the car for the night and the next morning it was like nothing ever happened. No check engine light, not a sign of trouble. We drove home with no issue. I found someone else with the same issue on this website and took that information to the dealership. They found that the ground wire in the front had been painted over at the factory resulting in a faulty connection.

Filed Mar 13, 2015 · Engine, Transmission · 675 miles · TX

Accelerating onto the freeway, the engine lost power and the check engine as well as several dash warning lights illuminated. The vehicle would not respond to the accelerator pedal, and would only go 45-50mph. I took it to the dealer and after reading out the data on the engine computer, I was told the problem was most likely "bad" gas. I was directed to just burn through the gas in the tank. When the car was returned to me from the garage it was running fine and I was not told anything had been done to correct the problem. I am still using the same tank of gas and have not experienced the problem again so far. I checked with the gas retailer and they have had no other complaints with respect to contaminated gas. I feel this is a safety issue. I had to drive the car on a 75mph freeway at 45mph to reach the dealer. Even with emergency flashers on that was a very harrowing experience.

Filed Jul 15, 2014 · Brakes, Electrical · 2,200 miles · VA

This is the second occurrence of the same issue, but while driving the vehicle at highway speeds, all dash lights illuminated (check engine, turn signals, temp warnings, etc) simultaneously and the information screen displayed an alert "engine inspection required". The incident also resulted in a loss of power steering/heavier-than-normal steering effort and brake warning indications, on the first instance (july 10, 2014), mazda roadside assistance was contacted and the vehicle was towed to the dealer with no fault/cause found. On the second instance (july 15, 2014), the vehicle was driven directly to the dealership. Technicians were able to diagnose the issue to a loose ground connection in the passenger front fender well.