P0406moderate severityPowertrain
EGR Sensor A Circuit High
on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD
What this code means
High voltage from the EGR position sensor A.
Symptoms
- Check Engine Light
- EGR control issues
Common causes
- Open circuit
- Short to power
- Faulty sensor
Diagnostic steps
- Test sensor voltage
- Check for opens/shorts
Repair notes
Repair wiring or replace EGR valve.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1