P0321 AUDI Ignition Engine Speed Input Circuit Range/Performance

Possible causes

– Faulty Ignition/Distributor engine speed sensor
– Ignition/Distributor engine speed sensor harness is open or shorted
– Ignition/Distributor engine speed sensor circuit poor electrical connection
– Faulty Crankshaft Position sensor
– Low battery charge
– Faulty Engine Control Module (ECM)

When is the obd code mean?

The P0321 code is triggered when the Engine Control Module (ECM) detects the signal is out of range.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of Power
– The engine may be harder to start
– The engine may stumble or stall

P0321 AUDI OBD Code Description