What causes B1412 on a Toyota?

Failed ambient temperature sensor Damaged front bumper wiring Corroded sensor connector Open in harness to ECM Failed A/C amplifier input

How do I fix B1412 on a Toyota?

Locate sensor behind front grille and inspect Check connector for corrosion and impact damage Test sensor resistance at known temperature Trace wiring back to ECM and amplifier Replace ambient sensor if reading is stuck

B1412 Ambient temperature sensor circuit open or short. The A/C reads wrong outside temperature

Q: What does B1412 mean on a Toyota?

B1412. Ambient temperature sensor circuit open or short. The A/C reads wrong outside temperature. Applies to Prius, Camry, Corolla, Matrix with automatic A/C, 2003 to 2009.

Category: Body
Severity: Body Warning Light
Applies to: Prius, Camry, Corolla, Matrix with automatic A/C, 2003 to 2009

What does B1412 mean on a Toyota?

B1412. Ambient temperature sensor circuit open or short. The A/C reads wrong outside temperature. This Toyota-enhanced code applies to Prius, Camry, Corolla, Matrix with automatic A/C, 2003 to 2009.

Common causes of B1412

Failed ambient temperature sensor
Damaged front bumper wiring
Corroded sensor connector
Open in harness to ECM
Failed A/C amplifier input

How to fix B1412

Locate sensor behind front grille and inspect
Check connector for corrosion and impact damage
Test sensor resistance at known temperature
Trace wiring back to ECM and amplifier
Replace ambient sensor if reading is stuck