P0507 Nissan Altima
Idle Air Control System RPM Higher Than Expected · Powertrain Code · Medium · Repair: Easy
What is P0507?
Idle speed is higher than the ECM expects. May be caused by a vacuum leak, stuck IAC valve, or throttle body issue.
When the Nissan Altima triggers code P0507 (idle air control system rpm higher than expected), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Nissan Altima.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Nissan Altima.
Common Causes on Nissan Altima
- Vacuum leak from cracked intake boot or PCV hose
- Dirty throttle body causing idle compensation overshoot
- Stuck-open IACV or auxiliary air valve
- Intake manifold gasket leak
Symptoms
- Check Engine Light on
- Idle speed above normal (900+ RPM)
- Idle does not settle after warmup
- Racing idle at stops
Notes for Nissan Altima
Check the large intake boot between the MAF and throttle body; cracks here are a very common high-idle cause on Nissan.