B0959:21 Code - Parking Assist Rear Sensor Left Middle Circuit Incorrect Period
Quick Answer
The B0959:21 diagnostic trouble code (DTC) specifically refers to a problem with the parking assist rear sensor left middle circuit in the vehicle. Common causes include Damaged wiring or connectors in the rear sensor left middle circuit, Faulty parking assist sensor in the left middle position, Issues with the control module responsible for the parking assist system. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B0959:21 indicates Parking Assist Rear Sensor Left Middle Circuit Incorrect Period.
- Common causes
- Common causes include Damaged wiring or connectors in the rear sensor left middle circuit, Faulty parking assist sensor in the left middle position, Issues with the control module responsible for the parking assist system.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
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Code B0959:21 Description
The B0959:21 diagnostic trouble code (DTC) specifically refers to a problem with the parking assist rear sensor left middle circuit in the vehicle. This code indicates that there is an incorrect period detected in the sensor's circuit, which can lead to issues with the parking assist system's functionality. The parking assist system uses sensors located in various positions on the vehicle to detect obstacles and provide the driver with alerts to assist in parking maneuvers. When the rear sensor left middle circuit is not functioning correctly, it can impact the accuracy of the parking assist system and potentially result in the system not providing accurate readings or alerts.
Common Causes of B0959:21
- Damaged wiring or connectors in the rear sensor left middle circuit.
- Faulty parking assist sensor in the left middle position.
- Issues with the control module responsible for the parking assist system.
- Water or debris intrusion affecting the sensor's performance.
- Electrical issues such as a blown fuse or relay related to the parking assist system.
Symptoms of B0959:21
- Parking assist system not providing accurate distance alerts.
- Warning lights related to the parking assist system illuminating on the dashboard.
- Inability to activate or use the parking assist system.
- Audible alerts from the parking assist system not functioning correctly.
- Difficulty or inconsistency in parking maneuvers due to lack of assistance from the parking assist system.
How to Fix B0959:21
- Begin by conducting a thorough inspection of the wiring, connectors, and sensors in the rear sensor left middle circuit to identify any visible damage or issues.
- Test the parking assist sensor in the left middle position to determine if it is functioning correctly or needs replacement.
- Check the control module for any faults or errors and reset or reprogram it as needed.
- Clear the DTC from the vehicle's system using a diagnostic tool and test the parking assist system to ensure it is now functioning properly.
- If necessary, replace any damaged components, such as wiring, sensors, or the control module, to resolve the issue effectively.
Cost to Fix B0959:21
The typical repair costs for addressing the B0959:21 code can vary depending on the specific cause of the issue and the parts or components that require replacement. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for this issue could fall within the range of $200 to $800, including parts and labor.
Tech Notes for B0959:21
B0959:02 Parking Assist Rear Sensor Left Middle Circuit Short to Ground
B0959:04 Parking Assist Rear Sensor Left Middle Circuit Open
B0959:06 Parking Assist Rear Sensor Left Middle Circuit Low Voltage/Open
B0959:08 Parking Assist Rear Sensor Left Middle Circuit Performance - Signal Invalid
B0959:18 Parking Assist Rear Sensor Left Middle Circuit Low Signal Amplitude
B0959:21 Parking Assist Rear Sensor Left Middle Circuit Incorrect Period
B0959:22 Parking Assist Rear Sensor Left Middle Circuit Too Short Low-Time
B0959:3A Parking Assist Rear Sensor Left Middle Circuit Incorrect Component Installed
B0959:3B Parking Assist Rear Sensor Left Middle Circuit Self-Test Malfunction
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