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B1291 Jeep Code - Park Assist Sensor 4

Quick Answer

The B1291 diagnostic trouble code for Jeep vehicles specifically relates to the Park Assist Sensor 4. Common causes include Faulty Park Assist Sensor 4, Wiring issues or damage to the sensor's connections, Corrosion or debris obstructing the sensor's functionality. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1291 Jeep indicates Park Assist Sensor 4.
Common causes
Common causes include Faulty Park Assist Sensor 4, Wiring issues or damage to the sensor's connections, Corrosion or debris obstructing the sensor's functionality.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1291 Jeep Description

The B1291 diagnostic trouble code for Jeep vehicles specifically relates to the Park Assist Sensor 4. This code indicates a malfunction or fault in the fourth park assist sensor, which is responsible for detecting obstacles or objects in close proximity to the vehicle when parking. The park assist system uses multiple sensors located on the front and rear bumpers to aid the driver in parking and maneuvering in tight spaces. When the Park Assist Sensor 4 is not functioning correctly, it can lead to issues with the park assist system, potentially compromising the safety and convenience of parking.

OBDII Code B1291 Jeep - Park Assist Sensor 4
B1291 Jeep Code - Park Assist Sensor 4

Common Causes of B1291 Jeep

  1. Faulty Park Assist Sensor 4.
  2. Wiring issues or damage to the sensor's connections.
  3. Corrosion or debris obstructing the sensor's functionality.
  4. Communication error between the sensor and the vehicle's computer.
  5. Damage to the sensor due to external factors such as collisions or impacts.

Symptoms of B1291 Jeep

  1. Park assist system not working or providing inaccurate readings.
  2. Warning lights or messages on the instrument cluster related to the park assist system.
  3. Difficulty in parking or maneuvering in tight spaces.
  4. Audible beeping or alerts from the park assist system indicating a problem.
  5. In some cases, the system may completely disable itself to prevent further issues.

How to Fix B1291 Jeep

  1. Begin by visually inspecting the Park Assist Sensor 4 and its surrounding area for any visible damage, debris, or corrosion. Clean the sensor and its connections if necessary.
  2. Use a diagnostic scan tool to check for specific error codes related to the park assist system. Clear any stored codes and see if the issue persists.
  3. Test the functionality of the Park Assist Sensor 4 by simulating obstacles in its detection range. Replace the sensor if it fails to detect objects accurately.
  4. Check the wiring harness connected to the sensor for any signs of damage or wear. Repair or replace any faulty wiring.
  5. Once the sensor and wiring have been checked and repaired, reset the vehicle's computer to clear any remaining error codes and test the park assist system to ensure proper functionality.

Cost to Fix B1291 Jeep

The cost of repairing a Park Assist Sensor 4 issue can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. On average, the cost of replacing a park assist sensor can range from $100 to $300, including parts and labor. However, additional costs may apply if there are wiring issues or other related components that need to be addressed. It's recommended to consult with a professional mechanic or dealership to get an accurate estimate for the repair. Keep in mind that labor rates can vary between different locations and service providers, so it's advisable to shop around for the best deal.

What does this mean?

Tech Notes for B1291 Jeep

B1291-11 PTS SENSOR 4 CIRCUIT SHORT TO GROUND

B1291-12 PTS SENSOR 4 CIRCUIT SHORT TO BATTERY

B1291-25 PTS SENSOR 4 SIGNAL SHAPE / WAVEFORM FAILURE

B1291-92 PTS SENSOR 4 PERFORMANCE OR INCORRECT OPERATION

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1291 Jeep Code

1. What does OBDII code B1291 for a Jeep Park Assist Sensor 4 indicate?

This code typically signals a malfunction in the Park Assist Sensor 4, which is responsible for assisting drivers in parking maneuvers.

2. What are common symptoms of a Park Assist Sensor 4 issue in a Jeep?

Common symptoms include a non-functional or inaccurate Park Assist System, warning lights on the dashboard, and audible alerts not working properly.

3. What are possible causes of the B1291 code in a Jeep?

Potential causes include faulty Park Assist Sensor 4, damaged wiring or connectors, water infiltration, or issues with the control module.

4. How can I diagnose the B1291 code related to Park Assist Sensor 4 in my Jeep?

Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the sensor and its connections for physical damage, and testing the sensor's functionality using appropriate diagnostic tools.

5. Can I still drive my Jeep with the B1291 code present?

While you can still drive the vehicle, it is recommended to address the issue promptly to ensure the proper functioning of your Park Assist System.

6. How can I repair the B1291 code in my Jeep related to Park Assist Sensor 4?

Repair options may include replacing the faulty Park Assist Sensor 4, repairing damaged wiring or connectors, clearing the code with a scanner, and recalibrating the system if necessary.

7. Is it possible to reset the B1291 code without repairing the issue in a Jeep?

While you can clear the code temporarily, it is essential to address the underlying problem to prevent recurring issues with the Park Assist Sensor 4.

8. Are there any preventive measures to avoid the B1291 code in a Jeep?

Regularly inspecting the Park Assist System, keeping the sensors clean, and addressing any issues promptly can help prevent the occurrence of the B1291 code.

9. Can extreme weather conditions affect the Park Assist Sensor 4 in a Jeep?

Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can impact the performance of the sensor and potentially trigger the B1291 code.

10. How long does it typically take to repair the B1291 code related to Park Assist Sensor 4 in a Jeep?

The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

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