Why can't a BMW obtain full transmission power?
2 Answers
BMW's inability to obtain full transmission power can be caused by: damaged ignition coils and clogged three-way catalytic converters. Here are the specific reasons: Damaged ignition coils: Spark plugs and ignition coils may experience reduced ignition efficiency over time, which can lead to poor performance in one of the engine's cylinders and trigger a fault code in the vehicle. The solution is to replace the ignition coils and spark plugs. BMW engines are equipped with variable valve lift and variable valve timing systems. If these systems malfunction, the engine may not be able to output full power, resulting in the transmission system's inability to obtain full transmission power. Clogged three-way catalytic converter: A clogged three-way catalytic converter can also prevent the engine from outputting full power, and incorrect ignition timing or ignition advance angle can contribute to this issue. Therefore, if this problem occurs, it is necessary to visit a 4S dealership to read the fault codes using a specialized diagnostic computer, identify the cause and location of the issue, and replace the faulty components.
Recently, my BMW also displayed this fault code, which really worried me. The mechanic said it's most likely due to a leaking turbocharger blow-off valve or a faulty mass airflow sensor, causing the engine to underperform. It could also be excessive carbon buildup on the electronic throttle valve, clogging it up like rusty pipes back in our hometown. Another common culprit is the high-pressure fuel pump—if fuel delivery isn't smooth, the car will feel sluggish, like it hasn't had enough to eat. I must remind you, this is no small matter. The best course of action is to head straight to the dealership for a diagnostic scan. Messing around yourself could damage critical drivetrain components, and repairs won't come cheap!
