B12A7
Mode Door Actuator Slow Or Door Obstructed
B12A7 is an OBD-II diagnostic trouble code meaning: Mode Door Actuator Slow Or Door Obstructed. Common causes: mechanical jamming of the damper, worn servo gears. Estimated repair cost: $22–167.
Symptoms
- Incorrect operation of the ventilation/climate control system
- Air supply modes do not switch
- Air flows are not distributed correctly
- Extraneous noises may be heard from under the dashboard
Causes
- Mechanical jamming of the damper
- Worn servo gears
- Servo power harness problems
- Oxidation of contacts
- Malfunction of the climate control control unit
How to Fix
- Check the mechanical part of the valve for jamming
- Diagnose the operation of the servo drive
- Check the power supply and control circuit of the servo drive
- Replace faulty servomotor if necessary
- Test the operation of the system after repair
Related codes
FAQ
What does the B12A7 code mean?
B12A7 is an OBD-II diagnostic trouble code that indicates: Mode Door Actuator Slow Or Door Obstructed
What causes a B12A7 error code?
The most common causes of B12A7 include: Mechanical jamming of the damper; Worn servo gears; Servo power harness problems; Oxidation of contacts.
How do I fix a B12A7 diagnostic trouble code?
To fix B12A7: Check the mechanical part of the valve for jamming. Diagnose the operation of the servo drive. Check the power supply and control circuit of the servo drive. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B12A7?
Yes, but get it checked soon
How much does it cost to fix B12A7?
The estimated repair cost for B12A7 is $22–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat