Engine-Codes - Lexus - B1421 Lexus

B1421 Lexus Code - Solar Sensor Circuit Passenger Side

- Code Popularity: 19,322 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1421 Lexus?

  • Faulty Solar Sensor
  • Solar Sensor harness is open or shorted
  • Solar Sensor circuit poor electrical connection
  • Faulty Air Conditioning Amplifier

|How to Fix the B1421 Lexus 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 B1421 Lexus?

Labor: 1.0

The cost to diagnose the B1421 Lexus 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 B1421 Lexus Possible Symptoms?

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

|What Does the B1421 Lexus Code Mean?

The solar sensor, which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning AUTO mode. The output voltage from the solar sensor varies in accordance with the amount of sunlight. When the sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The Air Conditioning Amplifier detects changes in the output voltage from the solar sensor.

Solar Sensor Circuit Passenger Side

|Need more Information on the B1421 Lexus Code?

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|Need Help with the B1421 Lexus Code?

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