EGR Valve Pintle Position Circuit
1990-1998 Buick Skylark 2.3L 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
- 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
Common Questions
What does code P1406 mean on a 1990-1998 Buick Skylark?
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 Buick Skylark?
Common symptoms of P1406 include: Check Engine Light, Rough idle, Poor acceleration, Increased emissions, Stalling.
What causes P1406 on a 1990-1998 Buick Skylark?
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.