P1033 AUDI Nitrogen Oxides Sensor Signal Too Low

Possible causes

– Faulty nitrogen oxides (NOx) sensor
– Nitrogen oxides (NOx) sensor harness is open or shorted
– Nitrogen oxides (NOx) sensor circuit poor electrical connection

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1033 AUDI OBD Code Description

Nitrogen oxides (NOx) sensor – signal too low