B1213HVAC

Air Temperature Sensor Circuit

B1213 indicates a fault in an air temperature sensor circuit used by the climate control system, such as the in-car or ambient temperature sensor reading out of range.

🚗 Yes, this affects climate control accuracy, not safety.
LOW
severity
Is B1213 really the problem on YOUR car?
Get a free AI diagnosis ranked by probability for your exact year, make, and model.
Run Free Diagnosis →

🎯 Top Causes, Ranked by Likelihood

#1Faulty temperature sensor$20-$120
45%
The in-car or ambient sensor fails and reads out of range.
#2Open or shorted sensor wiring$50-$200
30%
Wiring to the sensor is broken or shorted.
#3Corroded sensor connector$0-$80
15%
Corrosion at the connector disrupts the signal.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$20-$150
Shop Cost
$80-$250

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose B1213

1Identify which temperature sensor the code targets
2Check the sensor connector for corrosion
3Measure sensor resistance against spec
4Replace the sensor if it is out of range

❓ Frequently Asked Questions

Is B1213 serious?
No, it only affects how accurately the climate system controls temperature.
What causes B1213?
A failed cabin or ambient temperature sensor, or its wiring.
How much to fix B1213?
Often $20-$150 since the sensors are usually inexpensive.

🔗 Related Codes

B1200B1201B1250B1000
Don't guess. Know exactly what's wrong.
AmpAuto's AI ranks the real causes for your specific vehicle in 30 seconds.
Diagnose B1213 Free →