SC992

What it means

Software error (logged). Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.

Likely causes

• Logged exception. One-shot after a jam is noise. A storm with 819 → firmware/disk.

1. 1Read historySP5-990. Note the subcode and anything logged in the same minute. The standing number is often the last, not the first.
2. 2I/O then FRUSP5-803 / 5-804 on the related sensor or motor. Likely FRU: Firmware.

Parts to have on the truck

• Firmware

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