P0509
Idle Air Control System Circuit High
2007-2012 Nissan Altima 2.5L I4
Moderate SeverityPowertrainGeneric (SAE)
Description
High voltage in IAC circuit.
Symptoms
- High idle
- Racing idle
Common Causes
- Short to power
- Faulty IAC motor
- Open ground
Diagnostic Steps
- Test IAC voltage
- Check for shorts to power
Repair Notes
Replace IAC or repair 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
P0509 on Other Vehicles
Nissan 200SX
1995-1998 1.6L I4 GA16DE
Nissan 200SX SE-R
1995-1998 2.0L I4 SR20DE
Nissan 240SX
1995-1998 2.4L I4 KA24DE
Nissan 300ZX
1990-1996 3.0L V6 VG30DE
Nissan 300ZX Twin Turbo
1990-1996 3.0L Twin-Turbo V6 VG30DETT
Nissan 350Z
2003-2006 3.5L V6 VQ35DE
Nissan 350Z
2007-2009 3.5L V6 VQ35HR
Nissan 370Z
2009-2020 3.7L V6 VQ37VHR
Common Questions
What does code P0509 mean on a 2007-2012 Nissan Altima?
P0509 stands for "Idle Air Control System Circuit High". High voltage in IAC circuit.
What are the symptoms of P0509 on a Nissan Altima?
Common symptoms of P0509 include: High idle, Racing idle.
What causes P0509 on a 2007-2012 Nissan Altima?
Common causes of P0509 include: Short to power, Faulty IAC motor, Open ground.