B1333 Code Meaning, Symptoms, Causes and How to Fix

The B1333 code is a diagnostic trouble code that can occur in vehicles. It is triggered when the Decklid Ajar Rear Door Switch fails to meet the manufacturer's specifications. This can cause the engine light or service engine soon warning light to illuminate on the dashboard.

The main symptom of the B1333 code is the illuminated warning light on the dashboard. Other symptoms may include issues with the rear door, such as difficulty opening or closing, or the decklid not latching properly.

There are several possible causes for the B1333 code, including a faulty rear door switch, wiring issues, or a malfunctioning Body Control Module (BCM).

To fix the B1333 code, a thorough diagnosis is required. This may involve checking the wiring and connections related to the rear door switch, testing the switch itself for proper functionality, and inspecting the BCM for any faults.

Once the cause of the code is identified, the necessary repairs or replacements can be made to resolve the issue and clear the code.

What does it mean

The B1333 code indicates a problem with the Decklid Ajar Rear Door Switch. This can be caused by a faulty switch, wiring issues, or a malfunctioning Body Control Module.

Promptly addressing this issue is important to prevent further electrical problems. Regular vehicle maintenance, including inspecting wiring and connectors, can help minimize the risk of electrical issues.

what are the symptoms

The symptoms of the B1333 code may include the Engine Light or Service Engine Soon Warning Light turning on. Some symptoms that may occur with the B1333 code are:

  • Reduced engine power: The vehicle's engine performance may decrease, resulting in slower acceleration and overall reduced power.
  • Difficulty starting: The engine may have trouble starting or may need multiple attempts before it starts.
  • Erratic shifting: The transmission may shift irregularly or forcefully, causing jerking or hesitation when changing gears.
  • Faulty electrical components: The B1333 code can cause problems with other electrical systems in the vehicle, such as malfunctioning lights or unresponsive controls.
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It is important to address these symptoms promptly to prevent further damage and ensure the safe operation of the vehicle. Here are some possible discussions about the symptoms of the B1333 code:

  1. How does the B1333 code affect the vehicle's performance?
  2. Are there any other warning signs or indicators that may come with the B1333 code?

What are the causes

Possible causes of the B1333 code can be:

  • The Decklid Ajar Rear Door Switch may be faulty.
  • There might be an open or shorted Decklid Ajar Rear Door Switch harness.
  • The Decklid Ajar Rear Door Switch circuit could have a poor electrical connection.
  • The Body Control Module (BCM) could be faulty.
  • There might be other potential causes that are not listed.

When diagnosing the B1333 code, it is important to avoid common diagnostic mistakes. For example, do not overlook the possibility of a faulty Decklid Ajar Rear Door Switch or assume that the issue lies solely with the Body Control Module. It is crucial to thoroughly inspect the wiring harness and connectors for any signs of damage or corrosion. Additionally, checking for broken, bent, pushed out, or corroded connector pins is essential.

What Tools are Needed to diagnose

To diagnose the B1333 code, you will need a few diagnostic tools. These tools include an OBD-II scanner, a multimeter, a wiring diagram, and an inspection mirror.

Here are the steps you can follow to diagnose the B1333 code accurately:

  1. Start by connecting the OBD-II scanner to the vehicle's onboard computer system. This will allow you to read and retrieve the B1333 code.
  2. Next, visually inspect the wiring harness and connectors for any signs of damage. Look for frayed wires or loose connections that may be causing the issue.
  3. Use a multimeter to test the voltage and continuity of the Decklid Ajar Rear Door Switch circuit. This will help you determine if there are any electrical issues that need to be addressed.
  4. Refer to the wiring diagram to make sure you are testing the correct wires and connectors. This diagram will guide you in identifying the right components related to the Decklid Ajar Rear Door Switch.
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How to fix Step by Step

Step 1: Start by visually inspecting the related wiring harness and connectors. Look for any signs of damage or wear.

Step 2: Check for broken, bent, pushed out, or corroded connector pins. Ensure that all connections are secure.

Step 3: Use a multimeter to test the Decklid Ajar Rear Door Switch for continuity. If there is no continuity, the switch may be faulty and needs to be replaced.

Step 4: If the switch tests fine, proceed to test the BCM. Check for any fault codes related to the BCM and clear them if necessary.

Step 5: If all the above steps check out, perform a reprogramming or update of the BCM software, if applicable.

Step 6: After completing the repairs, clear all fault codes and test the vehicle to ensure that the B1333 code does not return.

What are the Common Diagnosis Mistakes

Common mistakes in diagnosing the B1333 code include:

  1. Not properly testing the Decklid Ajar Rear Door Switch and the Body Control Module (BCM) for any fault codes. It is important to thoroughly investigate these components as they are crucial for the system's functioning.
  2. Neglecting to visually inspect the wiring harness and connectors. This can lead to missing potential issues like damaged components or broken connector pins.
  3. Failing to check for poor electrical connections in the Decklid Ajar Rear Door Switch circuit. This can result in incorrect readings and inaccurate fault codes.
  4. Overlooking other potential causes not mentioned in the diagnostic trouble code description. It is important to consider all possibilities and conduct a thorough diagnosis.
  5. Not following the specified troubleshooting steps for the B1333 code. It is essential to follow a systematic approach to ensure an accurate diagnosis and effective repair.
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What is the Repair Cost

The repair cost for resolving the B1333 code can vary depending on factors such as location, vehicle make and model, and type of engine. It typically includes 1.0 hour of labor time, with rates ranging from $75 to $150 per hour.

Additional parts or repairs may be needed, so consult a qualified technician for an accurate estimate.

Can I drive safely with this code?

Driving with the B1333 code may compromise vehicle safety. The code indicates a problem with the Decklid Ajar Rear Door Switch, which monitors the decklid or rear door status.

Promptly address this issue to avoid potential hazards. Visually inspect wiring and connectors for damage, test switch resistance, and follow repair procedures to clear the code.

Conclusion

In conclusion, the B1333 code is associated with the Decklid Ajar Rear Door Switch and is triggered when it fails to meet the manufacturer's specifications. This can result in the illumination of the engine light or service engine soon warning light on the dashboard.

The potential causes for this code include a faulty switch, wiring issues, or poor electrical connections.

It is recommended to seek professional assistance for diagnosis and repair, as the cost may vary depending on the vehicle and engine type.

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