Over the last 10 months my 2018 WRX FA20 has come up with a P2195(Bank 1 Sensor 1) running lean four times. The first code came up at 27,500 miles. The dealership has replaced the O2 sensor and performed a top engine carbon clean. After the cleaning the engine went 7000 miles (longer than the usual 2500 before it returned), but it is back. The problem always occurs on the highway after driving for about 100-200 miles at 75-80mph. All the fluids and filters have been replaced since the cleaning occurred at 32,500. Car now has 39,000. This car is pure stock. I have not modified it. Only fluids/filters/maintenance.
Does anyone have any insight on this problem? I had one dealer indicate they did not want to work on the car so I had to go to a second. I'd like to see it fixed before the drive train warranty runs out.
Does anyone have any insight on this problem? I had one dealer indicate they did not want to work on the car so I had to go to a second. I'd like to see it fixed before the drive train warranty runs out.