KTM 350 EXC-F EU 2013 Owner's Manual page 108

21 BLINK CODE
Blink code FI warning lamp (MIL)
Error level condition
45 FI warning lamp (MIL) flashes 4x long, 5x short
EXC‑F EU, EXC-F SIX DAYS
Lambda sensor heater cylinder 1, sensor 1 - short circuit to ground or open circuit
EXC‑F EU, EXC-F SIX DAYS
Lambda sensor heater cylinder 1, sensor 1 - input signal too high
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