AutoCodes – Chevrolet – B0188 Chevrolet

B0188 Chevrolet Code - Right Sunload Sensor

Quick Answer

The left and right sunload sensors provide the Heating, Ventilation, and Air Conditioning (HVAC) Control Module with inputs as to the amount heat load the sun is placing on the interior of the vehicle. Common causes include Faulty Right Sunload Sensor, Right Sunload Sensor harness is open or shorted, Right Sunload Sensor 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: B0188 Chevrolet indicates Right Sunload Sensor.
Common causes: Common causes include Faulty Right Sunload Sensor, Right Sunload Sensor harness is open or shorted, Right Sunload Sensor 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 3,977

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 B0188 Chevrolet Description

The left and right sunload sensors provide the Heating, Ventilation, and Air Conditioning (HVAC) Control Module with inputs as to the amount heat load the sun is placing on the interior of the vehicle. The sunload sensors are photodiodes that are sensitive to light intensity. The Body Control Module (BCM) applies 5 volts to internal input resistors that are connected to the left and right signal circuits of the sunload sensor assembly. The BCM provides ground to the sensors through the low reference circuit. The BCM monitors the voltage drops across the sunload sensors and converts the voltage values to count values where 1 V is approximately equal to 51 counts. As the light intensity increases, the sunload sensors allow more current to travel through the circuits and the signal voltages decrease. As the light intensity decreases, the sunload sensors allow less current to travel through the circuits and the signal voltages increase. The BCM transmits the data to the HVAC control module over the class 2 serial data circuit.

OBDII Code B0188 Chevrolet - Right Sunload Sensor - AutoCodes.com — B0188 Chevrolet Code - Right Sunload Sensor

What does this mean?

What are the Possible Causes of the DTC B0188 Chevrolet?

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

How to Fix the DTC B0188 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 B0188 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.

Need more information about the B0188 Chevrolet code?

Need more information on how to fix the B0188 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0188 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 B0188 Chevrolet Code

1. What are the common symptoms of OBDII code B0188 in a Chevrolet related to the Right Sunload Sensor?

- Common symptoms include inaccurate temperature readings on the climate control system and issues with automatic HVAC functions.

2. What could cause OBDII code B0188 in a Chevrolet to trigger specifically for the Right Sunload Sensor?

- The code may be triggered due to a faulty Right Sunload Sensor, wiring issues, or a malfunction in the climate control module.

3. How can I diagnose the Right Sunload Sensor to confirm if it is causing OBDII code B0188 in my Chevrolet?

- You can use a multimeter to test the sensor's resistance and voltage output, and check for any visible damage or corrosion on the sensor itself.

4. Are there any DIY repair tips for fixing OBDII code B0188 related to the Right Sunload Sensor in a Chevrolet?

- DIY repair tips include checking and cleaning the sensor connections, replacing the sensor if faulty, and ensuring proper wiring connections.

5. Can a faulty Right Sunload Sensor affecting OBDII code B0188 impact the overall performance of my Chevrolet's HVAC system?

- Yes, a faulty Right Sunload Sensor can lead to inaccurate temperature readings and affect the performance of the HVAC system, causing discomfort for occupants.

6. How critical is it to address OBDII code B0188 for the Right Sunload Sensor in a Chevrolet promptly?

- It is important to address the code promptly to ensure the HVAC system functions correctly and to maintain a comfortable driving environment.

7. Is it recommended to seek professional help for diagnosing and repairing OBDII code B0188 related to the Right Sunload Sensor in a Chevrolet?

- Yes, seeking professional help from a certified mechanic or dealership can ensure accurate diagnosis and proper repair of the sensor and related components.

8. Can resetting the OBDII system clear the B0188 code related to the Right Sunload Sensor in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but it is crucial to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

9. Are there any recalls or technical service bulletins related to OBDII code B0188 for the Right Sunload Sensor in Chevrolet vehicles?

- Check with Chevrolet or a dealership for any recalls or technical service bulletins related to OBDII code B0188 to see if there are any known issues or remedies available.

10. How can regular maintenance help prevent OBDII code B0188 from occurring in a Chevrolet due to issues with the Right Sunload Sensor?

- Regular maintenance, including checking sensor connections, cleaning sensors, and inspecting wiring, can help prevent issues leading to OBDII code B0188 related to the Right Sunload Sensor.