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B1006

Q: What does OBD2 code B1006 mean?

B1006 means: Evaporator Temperature Sensor Circuit. The HVAC module has detected an abnormal signal from the evaporator temperature sensor, which monitors the AC evaporator core to prevent icing and regulate compressor cycling.

Evaporator Temperature Sensor Circuit

The HVAC module has detected an abnormal signal from the evaporator temperature sensor, which monitors the AC evaporator core to prevent icing and regulate compressor cycling.

SeverityMinor

CategoryHVAC

Est. Repair Cost$50–$200

Code TypeBody

DIY RepairYes

⚡ Common Causes

›Failed evaporator temp sensor
›Wiring fault
›Connector corrosion

⚠️ Symptoms

›AC blows warm intermittently
›AC cuts out too early

✅ How to Fix — Step by Step

Step 1:Inspect sensor wiring
Step 2:Test sensor resistance
Step 3:Replace sensor

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔Digital Multimeter
✔Basic Hand Tools
✔Flashlight
✔Vehicle Service Manual

Using the correct diagnostic tools helps identify the root cause of B1006 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Compare the evaporator sensor's live reading to actual duct temperature with a thermometer; a sensor reading far off from reality confirms the sensor rather than a refrigerant charge issue.

Frequently Asked Questions

What does OBD2 code B1006 mean?+

B1006 stands for Evaporator Temperature Sensor Circuit. The HVAC module has detected an abnormal signal from the evaporator temperature sensor, which monitors the AC evaporator core to prevent icing and regulate compressor cycling.

What causes code B1006?+

Failed evaporator temp sensor; Wiring fault; Connector corrosion

How do I fix code B1006?+

Inspect sensor wiring; Test sensor resistance; Replace sensor

How much does it cost to fix B1006?+

Estimated repair cost for B1006 is $50–$200.

Is B1006 DIY-friendly?+

Yes — B1006 is generally DIY-friendly with basic tools.