Engine-Codes - Generic - B0189

B0189 Code - Sunload Sensor 2 Circuit Performance

- Code Popularity: 894 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code B0189?

  • 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 B0189 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code B0189?

Labor: 1.0

The cost to diagnose the B0189 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B0189 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the B0189 Code Mean?

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.

Sunload Sensor 2 Circuit Performance

|Need more Information on the B0189 Code?

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|Code B0189 Information for Specific Makes

|Need Help with the B0189 Code?

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