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Engine-Codes – GMC – B0533 GMC

B0533 GMC Code - Left Turn Signal Circuit High

Quick Answer

The B0533 GMC code indicates a problem with the left turn signal circuit being too high. Common causes include Faulty turn signal switch, Short circuit in the wiring, Blown fuse. 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
B0533 GMC indicates Left Turn Signal Circuit High.
Common causes
Common causes include Faulty turn signal switch, Short circuit in the wiring, Blown fuse.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B0533 GMC Description

The B0533 GMC code indicates a problem with the left turn signal circuit being too high. This means that the voltage in the circuit is higher than the specified range, which can lead to issues with the turn signal functioning properly. The turn signal system in a vehicle is crucial for indicating to other drivers your intention to turn, change lanes, or merge, so any malfunction in this system can pose a safety hazard on the road.

OBDII Code B0533 GMC - Left Turn Signal Circuit High
B0533 GMC Code - Left Turn Signal Circuit High

Common Causes of B0533 GMC

  1. Faulty turn signal switch
  2. Short circuit in the wiring
  3. Blown fuse
  4. Malfunctioning turn signal relay
  5. Corrosion or damage to the wiring harness

Symptoms of B0533 GMC

  1. Left turn signal not working at all
  2. Left turn signal staying on constantly
  3. Rapid blinking of the left turn signal
  4. Dashboard indicator for left turn signal malfunction

How to Fix B0533 GMC

  1. Begin by visually inspecting the left turn signal circuit for any visible damage or corrosion.
  2. Use a multimeter to test the voltage in the circuit and determine if it is outside the specified range.
  3. Check the turn signal switch for proper operation and replace if necessary.
  4. Inspect the wiring harness for any shorts or damage and repair or replace as needed.
  5. Test the turn signal relay and replace if it is found to be faulty.

Cost to Fix B0533 GMC

The cost of repairing a left turn signal circuit high issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of parts for this repair could range from $50 to $200, while the labor cost could be between $100 and $300. This would bring the total cost of the repair to around $150 to $500. However, it's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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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 B0533 GMC Code

1. What are the common symptoms of OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- The common symptoms include the left turn signal staying on continuously without blinking, the turn signal light not functioning properly, or a dashboard indicator showing a fault with the left turn signal circuit.

2. What are the possible causes of OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- The code may be triggered by a faulty turn signal switch, a damaged wiring harness, a malfunctioning turn signal relay, or a problem with the left turn signal bulb or socket.

3. How can I diagnose OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- You can diagnose the code by visually inspecting the left turn signal components for any visible damage, checking the wiring for continuity and proper connections, and using a multimeter to test the voltage at different points in the circuit.

4. What are the repair options for OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- Depending on the underlying cause, the repair options may include replacing the turn signal switch, repairing or replacing damaged wiring, replacing the turn signal relay, or fixing any issues with the turn signal bulb or socket.

5. Can I drive my vehicle with OBDII code B0533 GMC (Left Turn Signal Circuit High) without fixing it immediately?

- It is not recommended to drive with this code unresolved as it can affect the safety of your vehicle by potentially causing confusion for other drivers on the road. Promptly addressing the issue is advisable.

6. Will OBDII code B0533 GMC (Left Turn Signal Circuit High) cause my vehicle to fail a state inspection?

- The specific regulations vary by location, but in many cases, a malfunctioning turn signal can result in a failed state inspection. It's best to address the issue before undergoing an inspection.

7. Are there any DIY repair tips for OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- DIY repair tips include checking and replacing the turn signal bulb, inspecting and repairing damaged wiring if visible, and ensuring all connections in the circuit are secure and free of corrosion.

8. Can extreme weather conditions contribute to triggering OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- Yes, extreme weather conditions like heavy rain, snow, or exposure to high temperatures can potentially damage the turn signal components and wiring, leading to the triggering of this code.

9. Is resetting the vehicle's computer necessary after fixing OBDII code B0533 GMC (Left Turn Signal Circuit High)?

- It is recommended to reset the vehicle's computer after fixing the issue to clear the error code and ensure proper functioning of the turn signal circuit. This can be done with an OBDII scanner tool.

10. What is the typical cost to repair OBDII code B0533 GMC (Left Turn Signal Circuit High) at a professional auto repair shop?

- The cost can vary depending on the specific cause of the issue and the labor rates in your area. Repairs for this code may range from $100 to $300 or more, including parts and labor.

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