BMW DTC P1658 – FlexRay Controller – Reset
DTC P1658 meaning on BMW
DTC P1658 on a BMW refers to a fault with the FlexRay controller that requires a reset. The FlexRay system is a high-speed communication network used in modern vehicles for various control modules to communicate with each other.
BMW DTC P1658 symptoms
Symptoms of DTC P1658 on a BMW may include issues with the vehicle’s communication network, such as intermittent or complete loss of communication between control modules. This can lead to malfunctions in various vehicle systems, including the engine, transmission, and other electronic components.
BMW DTC P1658 causes
The most common causes of DTC P1658 on a BMW include a temporary communication error within the FlexRay network, a faulty FlexRay controller, or a software glitch. Environmental factors, such as extreme temperatures or moisture, can also contribute to this fault.
BMW DTC P1658 seriousness
While DTC P1658 may not directly affect the drivability of the vehicle, it can lead to issues with various systems that rely on the FlexRay network for communication. Ignoring this fault can result in further malfunctions and potentially affect the overall performance and safety of the vehicle.
How to diagnose DTC P1658 on BMW
To diagnose DTC P1658 on a BMW, a diagnostic scan tool capable of reading manufacturer-specific fault codes is required. The technician will need to access the vehicle’s onboard diagnostic system to retrieve the code and perform further testing to pinpoint the exact cause of the fault.
- Use a diagnostic scan tool to retrieve the fault code.
- Check the FlexRay controller for any visible damage or loose connections.
- Inspect the vehicle’s wiring harness for any signs of wear or damage.
- Perform a communication test to verify the integrity of the FlexRay network.
How to fix DTC P1658 on BMW
Fixing DTC P1658 on a BMW typically involves resetting the FlexRay controller to clear the fault code and restore communication within the network. This can be done using a diagnostic scan tool or by disconnecting the vehicle’s battery for a few minutes to reset the system.
- Reset the FlexRay controller using a diagnostic scan tool.
- Disconnect the vehicle’s battery for a few minutes to reset the system.
- If the fault persists, inspect and replace the FlexRay controller if necessary.
- Ensure all connections within the FlexRay network are secure and free of corrosion.
How to erase DTC P1658 on BMW
Erasing DTC P1658 on a BMW can be done using a diagnostic scan tool that supports clearing fault codes. Once the fault has been diagnosed and fixed, the technician can use the scan tool to erase the code and reset the vehicle’s onboard computer.
- Connect the diagnostic scan tool to the vehicle’s OBD port.
- Select the option to erase fault codes from the system.
- Follow the on-screen prompts to confirm the deletion of the fault code.
- Verify that the fault code has been successfully erased by rescanning the vehicle.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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