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B1242 is a diagnostic trouble code (DTC) for "Air Flow Recirculation Door Driver Circuit Failure". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The B1242 trouble code detects an error with the air flow recirculation door driver.
The B1242 code is a generic OBD-II trouble code that notes a circuit error with the air flow recirculation door driver. The air flow recirculation system is a crucial part of the heating, ventilation, and air conditioning (HVAC) system, as it helps recirculate air through the vehicle’s cabin. When the body control module or the powertrain control module (PCM) notes that the air control recirculation door driver is malfunctioning, then the B1242 code will be detected.
The B1242 code can be caused by a few different things:
The B1242 trouble code will likely be accompanied by the check engine soon Warning Light illuminating on the vehicle’s gauge cluster. There will likely also be problems with the climate control system, such as an inability to recirculate, or improper air temperature.
The B1242 code will be diagnosed using a standard OBD-II trouble code scanner. A certified mechanic will use the scanner to view the freeze frame data and assess the B1242 code. The scanner will also be used to check for the presence of additional trouble codes. If the technician notices that there are multiple codes present, then they will need to be addressed in the order in which they are received. The mechanic will then reset the trouble codes, restart the vehicle, and check to see if the code is still present. If not, then the code was likely the cause of an intermittent error, or perhaps an inaccurate detection.
If the B1242 code remains detected, then the mechanic will begin with a visual inspection of all of the electrical components in the system. Any blown fuses, short wires, or open or corroded connectors will need to be replaced. The air flow recirculation door should then be inspected to make sure it is not jammed, and then the ground wire will be checked. If the issue is unresolved, then the problem is likely a faulty air inlet door actuator motor.
If the air inlet door actuator motor is not the problem, then the circuits and the HVAC system will need to be more thoroughly inspected.
After any component is replaced, the mechanic will need to reset the trouble codes, restart the vehicle, and again look for the presence of the B1242 code. By doing this, the mechanic will know as soon as the problem has been fixed.
The most frequently made error when diagnosing the B1242 code comes from a failure to properly follow the OBD-II trouble code diagnosis protocol. It is very important that the mechanic abide by the protocol at all times, to help ensure inspections and repairs that are thorough and efficient.
It is fairly common for electrical malfunctions to be overlooked when diagnosing the B1242 code, which can lead to unnecessary repairs.
A vehicle with the B1242 trouble code will still be drivable, though the climate control system will likely be compromised. The vehicle should be inspected and repaired sooner rather than later.
Repairs for the B1242 trouble code are:
While the B1242 signals an air flow recirculation door driver circuit failure in many vehicles, the code can stand for a different issue in some makes and models.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.