P2202moderate severityPowertrain
NOx Sensor Circuit Low Bank 1
on 2012 Chevrolet Express 4.3L V6 Vortec · RWD
What this code means
NOx sensor bank 1 signal is below minimum expected voltage.
Symptoms
- Check engine light
- Incorrect DEF injection rate
Common causes
- Sensor short to ground
- Wiring fault
- Failed sensor
Diagnostic steps
- Measure signal voltage
- Check wiring for shorts to ground
Repair notes
Repair wiring or replace NOx sensor.
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