U135B GMC Code - Lost Communication With Sunload Sensor
Quick Answer
The U135B GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the sunload sensor. Common causes include Faulty wiring or connectors between the computer system and sunload sensor, Malfunctioning sunload sensor, Communication protocol error within the computer system. 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
- U135B GMC indicates Lost Communication With Sunload Sensor.
- Common causes
- Common causes include Faulty wiring or connectors between the computer system and sunload sensor, Malfunctioning sunload sensor, Communication protocol error within the computer system.
- 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.
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Code U135B GMC Description
The U135B GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the sunload sensor. The sunload sensor is responsible for measuring the intensity of sunlight and adjusting various systems in the vehicle, such as the climate control and automatic headlights, accordingly. When communication with the sunload sensor is lost, it can lead to issues with the proper functioning of these systems.
Common Causes of U135B GMC
- Faulty wiring or connectors between the computer system and sunload sensor.
- Malfunctioning sunload sensor.
- Communication protocol error within the computer system.
- Corrosion or damage to the sensor or computer system components.
- Electrical interference affecting communication signals.
Symptoms of U135B GMC
- Inaccurate temperature adjustments by the climate control system.
- Automatic headlights not functioning correctly.
- Dashboard warning light indicating a communication error.
- Erratic behavior of other systems affected by the sunload sensor.
How to Fix U135B GMC
- Begin by conducting a thorough inspection of the wiring and connectors between the computer system and sunload sensor. Repair or replace any damaged components.
- Test the sunload sensor for proper functionality and replace it if necessary.
- Check the communication protocols within the computer system and reset or reprogram as needed.
- Clear the diagnostic trouble codes from the vehicle's system using a diagnostic scanner.
- Perform a final test drive to ensure that the communication issue has been resolved and that all affected systems are functioning correctly.
Cost to Fix U135B GMC
The typical repair costs for addressing a lost communication issue with the sunload sensor can range from $150 to $400, depending on the specific cause of the problem and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to obtain quotes from multiple reputable shops to get a more accurate estimate for this repair.
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Frequently Asked Questions about U135B GMC Code
1. What are the common symptoms of OBDII code U135B GMC (Lost Communication With Sunload Sensor)?
- Common symptoms include issues with the automatic climate control system, inconsistent temperature readings, and malfunctioning sunload sensor functions.
2. What are some possible causes of OBDII code U135B GMC?
- Possible causes can include a faulty sunload sensor, damaged wiring or connectors related to the sunload sensor, or a communication error within the vehicle's network.
3. How can I diagnose the root cause of OBDII code U135B GMC?
- To diagnose U135B, start by checking the wiring and connectors of the sunload sensor for any damage or corrosion. Next, use a diagnostic scan tool to communicate with the sensor and verify its functionality.
4. Can I still drive my vehicle with the U135B code present?
- While it may be possible to drive with the U135B code present, it is recommended to address the issue promptly to ensure proper functioning of the climate control system and other related components.
5. How can I repair OBDII code U135B GMC?
- Repairing U135B typically involves replacing a faulty sunload sensor, repairing damaged wiring or connectors, or addressing communication errors within the vehicle's network using appropriate diagnostic tools.
6. Is it safe to reset the OBDII code U135B GMC without fixing the underlying issue?
- It is not recommended to simply reset the code without addressing the root cause, as the issue may persist and affect the proper functioning of the climate control system and sunload sensor.
7. Are there any DIY tips for troubleshooting OBDII code U135B GMC?
- DIY troubleshooting tips include visually inspecting the sunload sensor and its connections, checking for any visible damage, and using a multimeter to test the sensor's electrical signal.
8. How do I prevent OBDII code U135B GMC from recurring in the future?
- To prevent the U135B code from recurring, it is essential to ensure regular maintenance of the sunload sensor, inspect wiring and connectors for damage, and address any communication issues promptly.
9. Can extreme weather conditions affect the sunload sensor and trigger OBDII code U135B GMC?
- Yes, extreme weather conditions such as prolonged exposure to intense sunlight or extreme cold can potentially impact the performance of the sunload sensor and contribute to the U135B fault code.
10. Is it necessary to visit a dealership or mechanic to diagnose and repair OBDII code U135B GMC?
- While it is possible to diagnose and repair U135B independently, seeking assistance from a dealership or qualified mechanic may be beneficial for complex issues or if specialized diagnostic equipment is required.
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