EGR Valve Pintle Position Circuit
2013-2019 Cadillac XTS 3.6L V6
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
- 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
P1406 on Other Vehicles
Cadillac ATS
2013-2019 2.0L Turbo I4
Cadillac ATS
2013-2019 2.5L I4
Cadillac ATS-V
2016-2019 3.6L Twin-Turbo V6
Cadillac CT4
2020-2024 2.0L Turbo I4
Cadillac CT4
2020-2024 2.7L Turbo I4
Cadillac CT4-V
2020-2024 2.7L Turbo I4
Cadillac CT4-V Blackwing
2022-2024 3.6L Twin-Turbo V6
Cadillac CT5
2020-2024 2.0L Turbo I4
Common Questions
What does code P1406 mean on a 2013-2019 Cadillac XTS?
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 Cadillac XTS?
Common symptoms of P1406 include: Check Engine Light, Rough idle, Poor acceleration, Increased emissions, Stalling.
What causes P1406 on a 2013-2019 Cadillac XTS?
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.