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AutoCodes - Generic - B1966

B1966 Code - A/C Post Heater Sensor Circuit Failure

- Code Popularity: 4,274 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jul 31, 2019
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|Code B1966 Possible Causes

  • Faulty A/C Post Heater Sensor
  • A/C Post Heater Sensor harness is open or shorted
  • A/C Post Heater Sensor circuit poor electrical connection
  • Faulty Dual Automatic Temperature Control (DATC) Module

|How do I Fix the Code B1966?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

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|What is the Cost to Diagnose the Code B1966?

Labor: 1.0

The cost of diagnosing the B1966 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B1966 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code B1966 Description

The Dual Automatic Temperature Control (DATC) Module monitors the A/C Post Heater Sensor. The DATC sets the OBDII code when the A/C Post Heater Sensor is not to factory specifications.

OBDII Code B1966 - A/C Post Heater Sensor Circuit Failure -
B1966 Code - A/C Post Heater Sensor Circuit Failure

|Need More Information on the B1966 Code?

Need more information on how to fix the B1966 code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the B1966 Code?

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|Code B1966 comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1966 code? Have you replaced any parts?
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