What causes B1421 on a Toyota?

Code set during test in dark shop Failed solar sensor cell Open in sensor harness Short in sensor harness Failed A/C amplifier input

How do I fix B1421 on a Toyota?

Retest in bright light before replacing parts Shine incandescent light on dash sensor Check sensor voltage changes with light Inspect harness between sensor and amplifier Replace solar sensor if no voltage change

B1421 Solar sensor circuit fault passenger side

Q: What does B1421 mean on a Toyota?

B1421. Solar sensor circuit fault passenger side. The A/C auto mode loses sun load correction. Applies to Prius, Camry, Avalon, RAV4, Tundra with automatic A/C, 2001 to 2010.

Category: Body
Severity: Body Warning Light
Applies to: Prius, Camry, Avalon, RAV4, Tundra with automatic A/C, 2001 to 2010

What does B1421 mean on a Toyota?

B1421. Solar sensor circuit fault passenger side. The A/C auto mode loses sun load correction. This Toyota-enhanced code applies to Prius, Camry, Avalon, RAV4, Tundra with automatic A/C, 2001 to 2010.

Common causes of B1421

Code set during test in dark shop
Failed solar sensor cell
Open in sensor harness
Short in sensor harness
Failed A/C amplifier input

How to fix B1421

Retest in bright light before replacing parts
Shine incandescent light on dash sensor
Check sensor voltage changes with light
Inspect harness between sensor and amplifier
Replace solar sensor if no voltage change