Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer system that helps different parts talk to each other had to restart unexpectedly.
This code indicates that the FlexRay communication system, which is used for high-speed data exchange between various vehicle components, has experienced a reset.
The P1658 code is triggered when the FlexRay controller, responsible for managing data communication between critical vehicle systems, undergoes an unexpected reset. This could be due to software glitches, power supply issues, or hardware malfunctions.
• Intermittent communication errors between vehicle systems
• Warning lights on the dashboard
• Reduced vehicle performance
• Software glitch in the FlexRay controller
• Power supply issues to the FlexRay module
• Faulty FlexRay controller hardware
FlexRay: A high-speed communication protocol used in automotive networks.
Controller: An electronic device that manages specific functions in a vehicle.
• Perform a diagnostic scan to confirm the P1658 code.
• Inspect the power supply and connections to the FlexRay controller.
• Check for software updates or patches for the FlexRay system.
• Update or reflash the FlexRay controller software.
• Repair or replace faulty wiring or connections.
• Replace the FlexRay controller if hardware is defective.
• OBD-II scanner
• Multimeter
• Diagnostic software tool
$200 - $800
Moderate
• BMW 5 Series
• Audi A4
• Mercedes-Benz C-Class
• Regularly update vehicle software.
• Ensure all electrical connections are secure.
• Avoid aftermarket modifications that interfere with vehicle electronics.
Communication System Issue
• Have the vehicle checked by a professional mechanic.
• Avoid driving the vehicle if warning lights are on.
• Keep a record of any recurring issues for future diagnostics.
Check with your vehicle manufacturer for warranty coverage on electronic components.
The P1658 code has become more common as vehicles increasingly rely on complex communication networks like FlexRay.
Moderate – While the vehicle may still be drivable, ignoring the issue could lead to more serious communication failures.
Driving with unresolved communication issues can impact vehicle safety and performance.
• Vehicle at operating temperature
• All electrical systems active
The FlexRay controller is typically located near the vehicle's central electronic module or under the dashboard.
Q: Can I drive with a P1658 code?
A: It's possible to drive, but it's not recommended as it may affect vehicle performance and safety.
Q: How can I prevent a P1658 code?
A: Regular software updates and maintenance checks can help prevent this issue.
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Universal · Digital multimeter
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