P2063 indicates a low voltage condition in the electrical circuit controlling the diesel exhaust fluid injection system. This fault prevents the engine management system from properly dosing reductant into the exhaust stream for emissions control. The issue is typically electrical rather than mechanical or fluid-related.
Heat and vibration often cause insulation breakdown or shorts in the undercarriage wiring.
Exposure to road salts and moisture leads to high resistance at the connection point.
Internal electrical failure within the valve creates an open or low resistance circuit.
A power protection device may have opened due to a momentary surge or short.
The dedicated controller for the SCR system may have internal circuit board failure.
Main engine computer failure is possible but statistically unlikely compared to wiring or components.
No, PCM failure is extremely rare; wiring and the injector valve are the primary suspects.
Short trips are possible, but the vehicle may enter limp mode or refuse to restart eventually.
No, this is an electrical circuit fault, not a low fluid level warning.
No, the fault will return immediately once the monitor runs if the electrical issue persists.