P2848 indicates that the transmission control module has detected an implausible signal from the shift fork "D" position sensor when the fork should be reporting a neutral position. This usually points to a sensor, wiring, or mechanical problem with the shift fork assembly rather than a control-module fault.
The sensor itself can drift, short internally, or fail to report the correct neutral position, producing an implausible signal even when the fork is mechanically centered.
A bent, worn, or contaminated fork, weak detent spring, or damaged synchronizer hub can prevent the fork from fully returning to its neutral position.
Corroded, chafed, loose, or moisture-contaminated terminals and harnesses can distort the sensor signal sent to the transmission control module.
On transmissions with hydraulic or electro-mechanical actuators, a leaking seal, sticking actuator, or low/clutchy hydraulic pressure can leave the fork out of position.
A mis-calibrated or failing TCM/PCM is possible but uncommon for this code; it should only be considered after sensor, wiring, and mechanical causes are ruled out.
It is not advisable. The transmission may enter limp mode, refuse certain gears, or shift harshly, which can increase wear or leave you stranded.
Usually not. Many cases are resolved by replacing the position sensor, repairing wiring, or addressing a binding fork or actuator problem.
Rarely. Although drivers are sometimes told the module needs replacement, P2848 is far more often caused by the sensor, wiring, or the shift fork mechanism itself.
Clearing the code may turn the light off temporarily, but the underlying fault will typically return if the sensor, wiring, or mechanical issue is not repaired.