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Diagnostic is a diagnostic trouble code (DTC) for "Trouble Code (DTC) P0837 – Four Wheel Drive (4WD) Switch Circuit Range Performance". 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 P0837 code is a generic powertrain code related to the transmission or gear box. In this case, it means a fault has been found relating to the four wheel drive (4WD) switch circuit.
Codes related to the P0837 include:
A P0837 code is stored only on all-wheel drive and four-wheel drive vehicles. Actuation of the four-wheel drive system is controlled by the four-wheel drive switch. When this code is stored, the vehicle’s transfer control case system has found a fault or received a reading outside of preset parameters relating to the four-wheel drive system.
Several types of four-wheel drive systems are manufactured to actuate changes between two- and four-wheel drive operation, including fully electronic systems and combinations of engine vacuum and electronically controlled solenoids. Most four-wheel drive switches utilize an on/off contact and will be mounted near the instrument panel. Refer to your vehicle service manual for specifics to your make and model.
Several problems may cause a P0837 code including:
Symptoms of a P0837 code may include:
A mechanic may use several methods to diagnose a P0837 trouble code, including:
One common mistake made when diagnosing the P0837 is determining a full transfer case failure when it’s simply a switch or solenoid. Rarely will a full transfer case rebuild be needed as often repairs can fix most of the problems that cause the P0837 code.
Because a vehicle’s safe driving operation is may be impacted due to faults that store a P0837 code, this is considered a potentially serious fault. When this code appears, it is recommended that you take your vehicle to a service center or mechanic for diagnosis and repair as soon as possible.
Several repairs can fix a P0837 trouble code and include:
Because a P0837 code is only stored on all-wheel drive and four-wheel drive vehicles, if the code appears and your vehicle is a two-wheel drive, it may be a faulty or defective ECM.
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 1-800-701-6230.