B1230Body / Climate

Climate Control Air Temperature Sensor

B1230 indicates a fault with an air temperature sensor used by the climate control system, such as a duct or ambient temperature sensor. A bad reading affects temperature regulation.

🚗 Yes. Climate control accuracy may suffer, but driving is not affected.

LOW

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed air temperature sensor$30-$150

40%

A faulty duct or ambient sensor sends an incorrect signal.

#2Wiring or connector fault to the sensor$50-$250

30%

Open or shorted wiring interrupts the sensor signal.

#3Sensor location blocked or contaminated$20-$100

15%

Debris near the sensor causes false readings.

#4HVAC control module fault$150-$600

15%

An internal module fault can misread the sensor.

🩺 Common Symptoms

Climate control not regulating well
Incorrect airflow temperature
Auto mode not working properly
Temperature complaints

💰 Repair Cost: DIY vs Shop

DIY Cost

$30-$200

Shop Cost

$100-$400

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose B1230

1Identify which air temperature sensor set the code

2Inspect the sensor and its location for blockage

3Check the sensor wiring and connector

4Test the sensor resistance against specification

❓ Frequently Asked Questions

Can I drive with B1230?

Yes. Only climate control accuracy is affected. Driving is unaffected.

What does this sensor measure?

It measures air temperature at a duct or ambient location so climate control can regulate the cabin.

What causes B1230?

A failed sensor, wiring faults, or a blocked sensor location.

🔗 Related Codes

B1225U0424B1218B1220