Engine-Codes - Generic - B1966

B1966 Code - A/C Post Heater Sensor Circuit Failure

- Code Popularity: 4,269 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1966?

  • 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 to Fix the B1966 Code?

Start by checking 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.

|What is the Cost to Diagnose the Code B1966?

Labor: 1.0

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

Does your Car have Safety Recalls? → Check here

|What are Code B1966 Possible Symptoms?

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

|What Does the B1966 Code Mean?

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.

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

|Code B1966 Information for Specific Makes

|Need Help with the B1966 Code?

Get the B1966 code diagnosed by a professional: Find a repair shop in your area