What does it mean?
B2602 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Parking Sensor EEPROM Error .
Symptoms
- Parking aid is disabled and gives no distance warnings at all
- A single long tone or repeated fault beep when reverse is engaged
- System fault message displayed each time the vehicle is started
- Sensors cannot be calibrated or the calibration will not complete
- Code comes back immediately after clearing, without any driving
- Related rear sensing features that depend on the module also stop working
Likely causes
- Corrupted memory content after a voltage drop or interruption during a programming or coding session
- Jump starting, a flat battery or a battery disconnected while the ignition was on
- Module fitted second hand or replaced without being configured to the vehicle
- Poor ground or high resistance in the module supply causing unstable operation
- Water damage inside the module affecting the memory circuit
- Interference or a failed programming attempt leaving incomplete data in memory
- Genuine internal memory failure in the module
How to fix it
- Read all module codes and check the battery and charging system before attempting anything else, since low voltage can cause both the fault and a failed repair attempt
- Connect a stable power supply to the vehicle and retry the module configuration or calibration procedure
- Verify the module part is correct for the vehicle and that it has been configured, not simply plugged in
- Measure supply voltage and ground quality at the module connector, including voltage drop while the system is active
- Inspect the module and its connector for moisture, corrosion and water tracks from the boot area
- Reprogram or update the module software if an update is available for it
- Replace and configure the module if the memory error persists with a proven supply, ground and wiring