•2111 (Blink Fault Code), VAG1551/2 Fault Code Number 00513
RPM sensor
Open or short circuit,
Defective sensor & cables, metal fragments on flywheel teeth
•2113 (Blink Fault Code), VAG1551/2 Fault Code Number 00515
Hall sender in distributor
Distributor alignment, faulty sender,
Mis-located sensor & distributor
2121 (Blink Fault Code), VAG1551/2 Fault Code Number 00516
Idle switch inside Throttle switch
Switch open ckt, stuck closed
Switch defective (Internal solder connections intermittent) or wiring problem