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: 1.0The cost of diagnosing the B1421 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B1421 TOYOTA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B1421 TOYOTA MeaningThe 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.
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