Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the computer in your car noticed a problem with the safety system that checks if the back wheels are stuck or not moving when they should be.
The vehicle's control module monitors the safety function related to the rear axle. If it detects that the rear wheels are locked when they shouldn't be, it triggers this code.
The P328D code is set when the control module identifies an issue with the safety function monitoring the rear axle. This could indicate a malfunction in the system that prevents the rear wheels from locking unexpectedly, which is crucial for vehicle safety.
• Warning light on the dashboard
• Unusual noises from the rear axle
• Reduced vehicle performance or handling
• Faulty wheel speed sensor
• Malfunctioning control module
• Damaged wiring or connectors in the rear axle system
Control Module: A computer in the vehicle that manages various functions.
Wheel Speed Sensor: A device that measures the speed of the vehicle's wheels.
• Perform a visual inspection of the rear axle and related components.
• Use a diagnostic scanner to read any additional trouble codes.
• Check the wheel speed sensors and wiring for damage or disconnection.
• Replace or repair the faulty wheel speed sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 3 Series
• Mercedes-Benz C-Class
• Audi A4
• Regular maintenance checks of the rear axle system.
• Ensure wheel speed sensors are clean and functioning.
• Inspect wiring and connectors periodically for wear and damage.
Safety System Issue
• Have the vehicle inspected by a professional as soon as possible.
• Avoid driving at high speeds until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on safety systems.
This code has been reported in vehicles with advanced safety monitoring systems, particularly in models with electronic stability control.
High – This issue affects the vehicle's safety systems and should be addressed promptly.
Driving with this code active may compromise vehicle safety and could lead to legal issues if involved in an accident.
• Vehicle stationary with engine running.
• Vehicle in motion to simulate wheel speed sensor operation.
The components involved are located near the rear axle of the vehicle, including the wheel speed sensors and associated wiring.
Q: Can I drive my car with the P328D code?
A: It's not recommended to drive with this code active as it may affect the vehicle's safety systems.
Q: What happens if I ignore the P328D code?
A: Ignoring this code could lead to safety issues, such as the rear wheels locking unexpectedly, which can be dangerous.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.