Power Derate

Sometimes

Mileage / Regen Notes

This fault typically does NOT inhibit active regeneration on its own, but it may affect regen control strategy. The ECM/ACM uses DPF outlet temp sensors to monitor regen progress and combustion efficiency. With a voltage low fault, the system may not accurately detect regen completion, potentially causing extended regen cycles or incomplete regens. If multiple DPF temp sensors are faulted, active regen will likely be inhibited. Verify regen status with scan tool — check if regen inhibit flags are present. Always repair this fault before attempting forced regen to prevent aftertreatment damage.