400331 bmw code. May 31, 2016 · It's Friday so I can't contact my mechanic today but come Monday I will post codes and exactly what's causing smoke and jerk in the transmission, which I'm sure the jerk is from bad transmission itself but keep us posted and let's see if any of the info will help you out with solution to your issue. May 3, 2022 · I'm no expert, but I've dealt with a few transmission issues on BMWs. . I suspect you have a bad connector, wiring harness, or module. The loss of communication CF0400 concerns me. What are you using to pull the codes? Jul 25, 2019 · Finally after downloading it and buying a windows laptop, I have installed it successfully and managed to scan my 7 series but honestly, I have no idea where to start regarding the codes. Dec 17, 2013 · Now when driving the car is fine until you shift to 4th gear and it will free rev for a second then after a firm bang it goes into transmission failsafe. Examples: 180101 or 1B9308 or 30FF. Once I clear the fault it goes out of transmission failsafe, then does it all over again when you get up to speed. If this is the case, a new trans will not fix the issue. That's not caused by the valve body. Hex Codes are typically given by more advanced scanners. Any thoughts? helpanyone? 2010 - 2024 BMW F & G Series 420431 4202F1 420331 Gear Ratio Monitoring Clutch FIXED. Joshua, The DTC 400331 you're seeing is related to the ratio monitoring for the 3-4 gear shift, indicating that the transmission control module (TCM) is detecting an implausible ratio during this shift. wkx udzdjy ssnj kupk bczei ulpwl jav sls drxgx nmjt