AutoCodes - OBDII Code List - B1421 TOYOTA

B1421 TOYOTA - Solar Sensor Circuit Passenger Side

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B1421 TOYOTA Possible Causes

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

How do I fix code B1421 TOYOTA?

Check 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.

Cost of diagnosing the B1421 TOYOTA code

Labor: 1.0

The cost of diagnosing the B1421 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

B1421 TOYOTA Description

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.
OBDII Code B1421 Toyota - Solar Sensor Circuit Passenger Side -

More Information

Need more information on how to fix the B1421 TOYOTA code?
Get Access to Factory Service Manuals

Need more help?

Get the B1421 Toyota code diagnosed by a professional: Find a repair shop in your area


Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the B1421 Toyota code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧