P2204moderate severityPowertrain
NOx Sensor Circuit Intermittent Bank 1
on 1996 Audi A6 2.8L V6 · AWD
What this code means
Intermittent signal from the NOx sensor on bank 1.
Symptoms
- Intermittent check engine light
- Erratic SCR operation
Common causes
- Loose connection
- Damaged wiring
- Sensor connector moisture ingress
Diagnostic steps
- Wiggle test wiring and connector
- Check for water intrusion
- Monitor signal stability
Repair notes
Clean and secure connector. Replace sensor or repair wiring if intermittent.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1