P0507: Idle Air Control System RPM Higher Than Expected
The ECM monitors engine idle speed against target idle RPM (typically 650–750 RPM in Drive). If actual idle speed stays 150–300 RPM higher than target for more than 10 seconds, P0507 is set. This indicates excessive unmetered air entering the engine around the throttle plate or via an air leak.
Driveability & Safety Advisory
Drivable, but engine will idle at 1,000–1,500 RPM, transmission engagement will feel harsh, and brakes must be pressed harder at stoplights.
Official Manufacturer TSB Advisories
Factory Condition: High idle after throttle body cleaning or battery disconnection due to lost ECM idle air memory.
Physical Component Location & Service Access
Electronic throttle body or idle air control valve mounted on intake manifold.
Electrical Specifications & Live PID Benchmarks
Scan Tool Live Data Targets
Digital Multimeter (DMM) Specs
Documented Model-Specific Case Studies
Root Cause: Throttle body was cleaned, increasing airflow gap; ECM retains old wide-open compensation values.
Verified Fix: Perform manual Nissan pedal-dance Idle Air Volume Learn sequence.
Technician Inspection & Testing Workflow
Did you or a mechanic clean the throttle body recently? If YES, perform ECM Idle Relearn procedure before replacing any parts.
Check for vacuum leaks: Clamp off PCV hose with plastic hose clamp pliers. If idle immediately drops to 650 RPM, replace the stuck-open PCV valve.
Clamp off brake booster vacuum hose and EVAP purge hose sequentially to isolate any hidden air leaks.
Perform smoke test on intake manifold runners.
Recommended Diagnostic Tools & Verified Parts
BlueDriver Bluetooth Pro OBDII Scan Tool
Wireless sensor telemetry & enhanced diagnostics (Engine, ABS, Airbag). Delivers verified vehicle repair reports.
Autel AutoLink AL519 / AL319 OBD2 Scanner
Color screen standalone scanner. One-click I/M emissions readiness status, freeze-frame data, live DTC reset.
AstroAI Digital Multimeter 6000 Counts TRMS
Auto-ranging multimeter for measuring sensor pin resistance (ohms), live DC bias voltage, and circuit continuity per OEM specs.
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Cost Breakdown
Tools & Parts Matrix
Diagnostic Questions & Answers
Why did my idle jump to 1,200 RPM after I cleaned my throttle body?
When you clean away thick black carbon, air can flow freely again through the factory engineered gap around the butterfly plate. The computer still thinks the carbon is there, so it provides too much fuel and air. An Idle Relearn tells the ECM to reset its base throttle position.