What is the solution for multiple cylinder injection devices being shut down in BMW?
3 Answers
The solution for multiple cylinder injection devices being shut down in BMW is to replace the ignition coil, which functions to prevent fuel from flowing into the cylinder and burning. Taking the 2021 BMW 525 as an example, it belongs to the mid-to-large-sized car category with body dimensions of: length 5106mm, width 1868mm, height 1500mm, a wheelbase of 3105mm, a fuel tank capacity of 68 liters, and a curb weight of 1705kg. The 2021 BMW 525 features a front suspension of double-wishbone independent suspension and a rear suspension of multi-link independent suspension. It is equipped with a 2.0L turbocharged engine, delivering a maximum horsepower of 184PS, a maximum power of 135kW, and a maximum torque of 290Nm, paired with an 8-speed automatic transmission.
I encountered the same situation last time when I was driving my BMW. The engine light came on, and there was a noticeable drop in power. Later, I asked a mechanic and found out it was a fault in the multi-cylinder fuel injection system. At first, I checked the fuse box myself and found a blown fuse. I replaced it, but the problem persisted. Then, I borrowed an OBD device from a friend to scan the fault codes, which showed that several fuel injectors were forcibly shut down by the ECU. The possible causes were clogged injectors or circuit issues. I tried cleaning the fuel system and using a better gasoline additive, but it still didn’t solve the problem. In the end, I had to take it to a BMW 4S shop. They diagnosed it as a faulty ignition module, which caused the computer to shut down some cylinders to protect the engine. After replacing the module, everything returned to normal. Don’t delay with such issues—get them fixed early to avoid engine damage and increased fuel consumption.
Don't panic when encountering this issue. Based on my car enthusiast experience, first check the basics: Is the engine warning light on? If yes, connect an OBD scanner to read the error codes. Common BMW issues include faulty fuel injectors, spark plug problems, or sensor abnormalities causing ECU cylinder deactivation. For DIY solutions, try clearing the fault codes and restarting the vehicle to see if it recovers. If not, check for loose or corroded fuel injector connectors and ignition coils; use a multimeter to measure voltage if necessary. For prevention, regularly use high-quality fuel, clean carbon deposits, and avoid frequent short-distance start-stop cycles. A friend of mine once experienced fuel injector mismatch due to poor fuel quality, which was resolved by switching gas stations. For severe cases, consult professional technicians who have specialized tools for in-depth diagnostics and ECU software reflashing.