To make your Nissan's parking assist network function —and permanently eliminate the B2729-14 fault code—you must isolate whether the issue stems from a blocked sensor, broken wiring loom, or a flawed sonar control module. Understanding Nissan DTC B2729-14
Turn the vehicle ignition ON without starting the engine. Shift into Reverse (engage the emergency brake for safety). Place your ear or a fingertip against each sensor face. nissan b272914 better
Use dielectric grease inside the electrical connector before plugging it back in. This keeps moisture out and ensures better conductivity. 3. Sensor Swap Troubleshooting (Smart Diagnostics) Before buying a new sensor, verify the failure. To make your Nissan's parking assist network function