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DTC P15B9-62: Ambient Temperature Sensor / Ambient Temperature Sensor "B" Signal Compare Failure [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

The ambient temp. sensor (thermistor assembly) and No. 2 ambient temp. sensor (thermistor assembly) are installed on the front of the cooler condenser assembly, and is used to detect the ambient temperature and control the air conditioning system.

When there is a difference in the temperature signals of the ambient temp. sensor (thermistor assembly) and No. 2 ambient temp. sensor (thermistor assembly)

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory DTC Output from Priority Note
P15B9-62 Ambient Temperature Sensor / Ambient Temperature Sensor "B" Signal Compare Failure Diagnosis Condition:
  1. Ignition switch is turned to ON after 1 hour elapses after ignition switch is turned off

Malfunction Status:
  1. When there is a difference in the temperature signals of the ambient temp. sensor (thermistor assembly) and No. 2 ambient temp. sensor (thermistor assembly)

Detection Time:
  1. Continuously for 3 seconds or more

Trip:
  1. 2 trip detection logic
  • Ambient temp. sensor (thermistor assembly)
  • No. 2 ambient temp. sensor (thermistor assembly)
  • Harness or connector
  • Air conditioning amplifier assembly
Come on Memorized Air Conditioner B SAE Code:
  1. P15B9