When it comes to BMWs, code P0355 is an indicator of an Ignition Coilpack E Primary/Secondary Circuit Malfunction. This means that the engine has started, but the battery voltage must be between 9 and 17 volts. If the DME does not receive any valid pulses from the ignition module for the Ignition Coilpack C primary circuit, it is an indication that there may be an issue with the power supply. To help diagnose and address the issue, it is important to understand what could be causing the malfunction. Below is a table that outlines some of the common causes and solutions for the BMW code P0355.
Common Causes and Solutions for BMW Code P0355
| Cause | Solution |
|---|---|
| Engine speed (RPM) sensor has failed | Replace the sensor |
| Camshaft Position (CMP) sensor has failed | Replace the sensor |
| Power Supply Relay is shorted to an open circuit | Replace the relay |
| There is a malfunction in voltage supply | Check the wiring and connections |
| Ignition coilpack is damaged or it has failed | Replace the coilpack |
| Cylinder 1 to 4 Fuel Injector are shorted | Replace the injectors |
When a BMW owner notices that their vehicle is displaying the code P0355, it is an indication that something is not functioning as it should be. To determine the cause of this fault code, one must understand the possible causes, as well as the best solutions to address the issue. Ignoring the code can have serious consequences, as the issue can worsen and cause further damage to the vehicle. Knowing the common causes and solutions for BMW Code P0355 can help to ensure that the issue is properly addressed and resolved.
Engine Speed (RPM) Sensor
One of the most common causes of Code P0355 is a malfunctioning engine speed (RPM) sensor. The RPM sensor is responsible for measuring the speed of the engine and sending a signal to the engine control unit (ECU). If the RPM sensor fails, it can cause Code P0355 to be displayed on the dashboard. To resolve this issue, the BMW owner must replace the engine speed sensor.
Camshaft Position (CMP) Sensor
The Camshaft Position (CMP) sensor is also known as the crankshaft position sensor, and it is responsible for measuring the speed and position of the crankshaft. If the CMP sensor fails or is damaged, it can cause Code P0355 to be displayed, and the BMW owner must replace the sensor in order to resolve the issue.
Power Supply Relay
The Power Supply Relay is responsible for providing power to the ignition coilpack. If the relay is shorted to an open circuit, it can cause Code P0355 to be displayed. To address the issue, the BMW owner must replace the power supply relay.
Voltage Supply
If the power supply is not functioning correctly, it can cause Code P0355 to be displayed. To resolve this issue, the BMW owner must check the wiring and connections to ensure that the power supply is operating as intended.
Ignition Coilpack
If the ignition coilpack is damaged or has failed, it can cause Code P0355 to be displayed. To address the issue, the BMW owner must replace the ignition coilpack.
Cylinder 1 to 4 Fuel Injector
If the cylinder 1 to 4 fuel injectors are shorted, it can cause Code P0355 to be displayed. To resolve the issue, the BMW owner must replace the cylinder 1 to 4 fuel injectors.
Conclusion: Diagnosing and Resolving BMW Code P0355
When a BMW owner notices that their vehicle is displaying Code P0355, it is important to understand the possible causes and the best solutions to address the issue. By understanding the common causes and solutions for BMW Code P0355, the BMW owner can ensure that the issue is properly diagnosed and resolved. Ignoring the code can result in further damage to the vehicle, so it is important to have the issue addressed as soon as possible.
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