AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - B12A7

B12A7 Code - Mode Door Actuator Slow Or Door Obstructed

- Code Popularity: 1,610 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC B12A7?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Stuck or damaged linkage or door
  • Faulty Mode Door Actuator
  • Mode Door Actuator harness is open or shorted
  • Mode Door Actuator circuit poor electrical connection
  • Electronic Manual Temperature Control (EMTC) Module
  • Electronic Automatic Temperature Control (EATC) Module
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC B12A7?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for B12A7 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B12A7 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B12A7 Description

Under normal operation, to rotate the mode door actuator clockwise, the Electronic Manual Temperature Control (EMTC) or Electronic Automatic Temperature Control (EATC) module supplies voltage and ground to the floor/defrost/panel mode door actuator motor through the circuit. To rotate the mode door actuator counterclockwise, the EMTC module or EATC module reverses the voltage and ground circuits.
The mode door actuator feedback resistor is supplied a ground from the EMTC module or EATC module and a 5-volt reference voltage. The EMTC module or EATC module reads the voltage on the mode door actuator feedback circuit to determine the mode door actuator position by the position of the actuator feedback resistor wiper arm.

OBDII Code B12A7 - Mode Door Actuator Slow Or Door Obstructed - AutoCodes.com
B12A7 Code - Mode Door Actuator Slow Or Door Obstructed

Need More Information on the Code?

Need more information on how to fix the B12A7 code? Get Access to Factory Service Manuals

Information for Specific Makes

Need Help with the Code?

Get the B12A7 code diagnosed by a professional: Find a repair shop in your area

Code B12A7 comments

Help us improve AutoCodes.com. 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 B12A7 code? Have you replaced any parts?
Any information is appreciated. Thanks