AutoCodes – Chevrolet – B0189 Chevrolet

B0189 Chevrolet Code - Sunload Sensor 2 Circuit Performance

Quick Answer

The sunload sensor is a 2-wire photo diode. Common causes include Faulty Sunload Sensor 2, Sunload Sensor 2 harness is open or shorted, Sunload Sensor 2 circuit poor electrical connection. 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: B0189 Chevrolet indicates Sunload Sensor 2 Circuit Performance.
Common causes: Common causes include Faulty Sunload Sensor 2, Sunload Sensor 2 harness is open or shorted, Sunload Sensor 2 circuit poor electrical connection.
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 Popularity 991

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0189 Chevrolet Description

The sunload sensor is a 2-wire photo diode. The vehicle uses left and right sunload sensors. The two sensors are integrated into the sunload sensor assembly along with the ambient light sensor. Low reference and signal circuits enable the sensor to operate. As the sunload increases, the sensor signal decreases. The sensor operates within an intensity range between completely dark and bright. The sensor signal varies between 0-5 volts. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module converts the signal to a range between 0-255 counts. The sunload sensor provides the HVAC control module a measurement of the amount of light shining on the vehicle. Bright or high intensity, light causes the vehicles inside temperature to increase. The HVAC system compensates for the increased temperature by diverting additional cool air into the vehicle.

OBDII Code B0189 Chevrolet - Sunload Sensor 2 Circuit Performance - AutoCodes.com — B0189 Chevrolet Code - Sunload Sensor 2 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC B0189 Chevrolet?

Faulty Sunload Sensor 2
Sunload Sensor 2 harness is open or shorted
Sunload Sensor 2 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0189 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0189 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the B0189 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0189 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B0189 Chevrolet Code

1. What are common symptoms of OBDII code B0189 in a Chevrolet related to the Sunload Sensor 2 Circuit Performance?

- Common symptoms include inaccurate temperature readings from the sunload sensor, inconsistent air conditioning performance, and potential issues with the automatic climate control system.

2. What are the possible causes of OBDII code B0189 in a Chevrolet?

- The code B0189 may be triggered by a faulty sunload sensor, damaged wiring or connectors in the circuit, issues with the climate control module, or a malfunctioning HVAC system.

3. How can I diagnose the Sunload Sensor 2 Circuit Performance issue in my Chevrolet?

- Diagnosis typically involves inspecting the sunload sensor, checking the wiring and connectors for any damage, testing the sensor's functionality, and using a diagnostic scanner to read the trouble codes stored in the vehicle's computer.

4. Can I repair the Sunload Sensor 2 Circuit Performance problem in my Chevrolet on my own?

- Depending on your automotive repair skills, you may be able to replace the sunload sensor, repair damaged wiring or connectors, or reset the trouble codes using an OBDII scanner. However, more complex issues may require professional diagnosis and repair.

5. Are there any tips for fixing OBDII code B0189 related to the Sunload Sensor 2 Circuit Performance in a Chevrolet?

- Before replacing any components, carefully inspect the sensor, wiring, and connectors for visible damage. Clearing the trouble codes using a scanner and monitoring the system for any recurring issues after repairs can help ensure the problem is fully resolved.

6. How important is it to address OBDII code B0189 in a Chevrolet related to the Sunload Sensor 2 Circuit Performance?

- While the code may not always result in immediate drivability issues, ignoring it can impact the accuracy of the climate control system and potentially lead to discomfort while driving in extreme temperatures. It's best to address the issue promptly to ensure optimal function.

7. Can a malfunctioning sunload sensor affect other systems in my Chevrolet?

- Yes, a malfunctioning sunload sensor can impact the overall performance of the automatic climate control system, potentially leading to inefficient operation, inaccurate temperature settings, and increased energy consumption.

8. How long does it typically take to repair OBDII code B0189 related to the Sunload Sensor 2 Circuit Performance in a Chevrolet?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing a sensor or fixing wiring may take an hour or two, while more complex diagnostics and repairs could extend the process to several hours or more.

9. Is it safe to continue driving my Chevrolet with OBDII code B0189 related to the Sunload Sensor 2 Circuit Performance?

- While the vehicle may still be operable with this code present, it's advisable to address the issue as soon as possible to prevent potential discomfort or inefficiencies in the climate control system. Continuing to drive with unresolved issues may lead to further complications.

10. Can extreme weather conditions impact the Sunload Sensor 2 Circuit Performance in a Chevrolet?

- Yes, extreme heat or cold can potentially exacerbate issues with the sunload sensor's performance, leading to inaccurate readings and affecting the overall functionality of the climate control system. Regular maintenance and timely repairs can help mitigate these effects.