B0958:21 Code - Parking Assist Rear Sensor Left Corner Circuit Incorrect Period
Quick Answer
The B0958:21 diagnostic trouble code (DTC) specifically refers to an issue with the Parking Assist Rear Sensor Left Corner Circuit. Common causes include Faulty rear left corner parking sensor, Wiring issues such as damaged or corroded wires, Electronic control module (ECM) malfunction. 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
- B0958:21 indicates Parking Assist Rear Sensor Left Corner Circuit Incorrect Period.
- Common causes
- Common causes include Faulty rear left corner parking sensor, Wiring issues such as damaged or corroded wires, Electronic control module (ECM) malfunction.
- 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 B0958:21 Description
The B0958:21 diagnostic trouble code (DTC) specifically refers to an issue with the Parking Assist Rear Sensor Left Corner Circuit. This code indicates that there is an incorrect period detected in the circuit of the rear left corner sensor of the parking assist system. The parking assist system is designed to help drivers park their vehicles safely by providing alerts when objects are in close proximity to the vehicle. When this sensor circuit malfunctions, it can lead to inaccurate readings and potentially compromise the effectiveness of the parking assist system.
Common Causes of B0958:21
- Faulty rear left corner parking sensor.
- Wiring issues such as damaged or corroded wires.
- Electronic control module (ECM) malfunction.
- Poor connections or loose terminals in the sensor circuit.
- Environmental factors such as water intrusion affecting the sensor.
Symptoms of B0958:21
- Parking assist system alerts not working properly.
- Inaccurate distance readings displayed on the parking assist display.
- Difficulty in parking due to lack of accurate sensor feedback.
- Warning lights related to the parking assist system illuminated on the dashboard.
How to Fix B0958:21
- Begin by conducting a thorough visual inspection of the rear left corner parking sensor and its wiring for any visible damage or corrosion.
- Use a multimeter to test the continuity of the sensor circuit and check for any open or short circuits.
- If the sensor is found to be faulty, replace it with a new sensor compatible with the vehicle's make and model.
- Ensure all connections and terminals in the sensor circuit are secure and free of debris.
- Clear the DTC from the vehicle's ECM using a diagnostic scan tool after completing the repair to reset the system.
Cost to Fix B0958:21
The typical repair costs for addressing a B0958:21 code related to the Parking Assist Rear Sensor Left Corner Circuit can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty sensor and addressing wiring issues can range from $200 to $500, including parts and labor. However, it is important to note that the actual repair costs may differ based on the location, vehicle make and model, and labor rates at auto repair shops. It is recommended to obtain a detailed estimate from a qualified mechanic or repair shop to determine the exact cost for resolving this issue.
Tech Notes for B0958:21
B0958:02 Parking Assist Rear Sensor Left Corner Circuit Short to Ground
B0958:04 Parking Assist Rear Sensor Left Corner Circuit Open
B0958:06 Parking Assist Rear Sensor Left Corner Circuit Low Voltage/Open
B0958:08 Parking Assist Rear Sensor Left Corner Circuit Performance - Signal Invalid
B0958:18 Parking Assist Rear Sensor Left Corner Circuit Low Signal Amplitude
B0958:21 Parking Assist Rear Sensor Left Corner Circuit Incorrect Period
B0958:22 Parking Assist Rear Sensor Left Corner Circuit Too Short Low-Time
B0958:3A Parking Assist Rear Sensor Left Corner Circuit Incorrect Component Installed
B0958:3B Parking Assist Rear Sensor Left Corner Circuit Self-Test Malfunction
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Frequently Asked Questions about B0958:21 Code
1. What does the OBDII code B0958:21 mean?
This code indicates an issue with the Parking Assist Rear Sensor Left Corner Circuit, specifically an incorrect signal period or timing.
2. What are the common symptoms of code B0958:21?
Symptoms may include a malfunctioning parking assist system, intermittent or no sensor response, or warning messages related to parking assist on the dashboard.
3. What causes the B0958:21 code to be triggered?
Possible causes include a damaged or faulty left corner rear parking sensor, wiring issues such as shorts or open circuits, or a malfunctioning control module.
4. How can I diagnose the B0958:21 code?
Start by visually inspecting the sensor and wiring for damage. Use a multimeter to test for proper voltage and continuity, and check for loose or corroded connections.
5. Can I still drive my vehicle with the B0958:21 code?
Yes, the vehicle can still be driven, but the parking assist system may not function correctly, increasing the risk of parking or reversing accidents.
6. How do I fix the B0958:21 code?
Repair or replace the faulty parking sensor, fix damaged wiring or connections, and clear the code using an OBDII scanner.
7. How much does it cost to repair the B0958:21 code?
Repair costs vary depending on the issue but typically range from $100 to $300 for sensor replacement or wiring repairs.
8. Can a dirty sensor cause the B0958:21 code?
Yes, dirt or debris on the sensor can interfere with its operation and cause signal timing issues. Cleaning the sensor may resolve the problem.
9. Do I need professional help to fix the B0958:21 code?
If the issue involves complex wiring or module diagnostics, professional assistance may be required. Simple fixes like cleaning or replacing the sensor can often be done at home.
10. Will clearing the B0958:21 code with a scanner fix the problem?
Clearing the code may temporarily remove the warning, but the underlying issue must be resolved to prevent the code from returning.
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