Hoping a Mazda Tech may be able to provide technical info as to what kind of transmission damage is likely by severely burned tranny fluid. Trans has been acting "different" since shortly after purchase. (See History paragraph below). Mazda dealership has my 2018 CX-5 AWD with shifting problem. Threw a P0847 code (Transmission Fluid Pressure Sensor/Switch B Circuit Low). Technician ordered sensor to replace but when trans was opened, trans fluid was severely burned. Tech recommended replacing entire trans as fluid was so bad. Dealer service dept took photos and sent to Mazda to see what they thought. Mazda said replace sensor and put it back together. So now complex tranny has a new sensor, but has possible internal damage due to severely burned fluid. Looking for technical terminology to share with Mazda HQ explaining what else may have been damaged inside tranny.
History: 6/21/19 I purchased Certified used 2018 CX-5 AWD with 4,168 miles on it. Vehicle was a dealership loaner car. After driving it for several days, noticed the driveabity was not similar to previous 2017 I test drove. Noticed slightly nervous shifting, occasional searching for gears, and what I thought was slightly hard shifting. Looked at forums etc. 7/25/19 with 8128 miles took the vehicle in to have Rocker Arm Recall #3719F performed and described driveability issue. Checked out fine with no tranny or shifting problems. Still didn't seem like a nearly new-car smooth tranny. Back to dealer 8/22/19 with 9396 miles for first oil change, inquired if they had other tranny complaints told them still didn't seem right. Said they didn't see any issues. Back 11/15/19 with 15040 miles for second oil change, again mentioned shifting slightly erratically, inspection showed no issues. 12/22/19, just over 16,000 miles, check engine light came on 5 miles from home. Threw a P0847 code (Transmission Fluid Pressure Sensor/Switch B Circuit Low). Researched online which said damage could occur if driven, had the car towed to dealership 12/23/19. Car is still there 1/8/20. Requesting photos and and dealership correspondence for my records.
History: 6/21/19 I purchased Certified used 2018 CX-5 AWD with 4,168 miles on it. Vehicle was a dealership loaner car. After driving it for several days, noticed the driveabity was not similar to previous 2017 I test drove. Noticed slightly nervous shifting, occasional searching for gears, and what I thought was slightly hard shifting. Looked at forums etc. 7/25/19 with 8128 miles took the vehicle in to have Rocker Arm Recall #3719F performed and described driveability issue. Checked out fine with no tranny or shifting problems. Still didn't seem like a nearly new-car smooth tranny. Back to dealer 8/22/19 with 9396 miles for first oil change, inquired if they had other tranny complaints told them still didn't seem right. Said they didn't see any issues. Back 11/15/19 with 15040 miles for second oil change, again mentioned shifting slightly erratically, inspection showed no issues. 12/22/19, just over 16,000 miles, check engine light came on 5 miles from home. Threw a P0847 code (Transmission Fluid Pressure Sensor/Switch B Circuit Low). Researched online which said damage could occur if driven, had the car towed to dealership 12/23/19. Car is still there 1/8/20. Requesting photos and and dealership correspondence for my records.
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