EGR Valve Pintle Position Circuit
2017-2024 GMC Acadia 2.5L I4
Description
The PCM detected that the EGR valve pintle position sensor voltage is outside the expected range. The position sensor provides feedback to the PCM about the actual EGR valve opening.
Symptoms
- Check Engine Light
- Rough idle
- Poor acceleration
- Increased emissions
- Stalling
Common Causes
- Faulty EGR valve position sensor
- Carbon buildup affecting valve movement
- Wiring damage to position sensor
- Corroded connector
- EGR valve mechanically binding
Diagnostic Steps
- Test EGR position sensor voltage at rest and during operation
- Command EGR open/closed with scan tool and monitor position
- Inspect EGR valve for carbon buildup
- Check wiring and connector for damage
Repair Notes
Clean or replace EGR valve. Check position sensor wiring.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P1406 on Other Vehicles
Common Questions
What does code P1406 mean on a 2017-2024 GMC Acadia?
P1406 stands for "EGR Valve Pintle Position Circuit". The PCM detected that the EGR valve pintle position sensor voltage is outside the expected range. The position sensor provides feedback to the PCM about the actual EGR valve opening.
What are the symptoms of P1406 on a GMC Acadia?
Common symptoms of P1406 include: Check Engine Light, Rough idle, Poor acceleration, Increased emissions, Stalling.
What causes P1406 on a 2017-2024 GMC Acadia?
Common causes of P1406 include: Faulty EGR valve position sensor, Carbon buildup affecting valve movement, Wiring damage to position sensor, Corroded connector, EGR valve mechanically binding.