P0406
EGR Sensor A Circuit High
2014-2014 Cadillac SRX 3.0L V6
Moderate SeverityPowertrainGeneric (SAE)
The 2014 Cadillac SRX is equipped with a 3.0L V6 engine. Below you'll find detailed p0406 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0406 on Other Vehicles
Common Questions
What does code P0406 mean on a 2014-2014 Cadillac SRX?
P0406 stands for "EGR Sensor A Circuit High". High voltage from the EGR position sensor A.
What are the symptoms of P0406 on a Cadillac SRX?
Common symptoms of P0406 include: Check Engine Light, EGR control issues.
What causes P0406 on a 2014-2014 Cadillac SRX?
Common causes of P0406 include: Open circuit, Short to power, Faulty sensor.
Last updated: March 2026