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P0837 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
The 4-Wheel Drive Switch Circuit tells the Transmission Control Module (TCM) what mode the 4-wheel drive system is in (i.e. 4-wheel high, 4-wheel low, 2-wheel). If this switch does not send back a plausible signal, code P0837 will be stored and the 4-wheel drive system may be disabled.
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OBD-II Code 4-wheel drive light is flashing is defined as a Four Wheel Drive (4WD) Switch Circuit Range/Performance
The 4-Wheel Drive Switch Circuit tells the Transmission Control Module (TCM) what mode the 4-wheel drive system is in (i.e. 4-wheel high, 4-wheel low, 2-wheel). If this switch does not send back a plausible signal, code P0837 will be stored and the 4-wheel drive system may be disabled.