Idle Air Control System RPM Higher Than Expected
Code P0507 indicates that engine idle speed is 200+ RPM higher than the target stored in the engine computer. Common causes include carbon sludge holding the throttle butterfly plate slightly open, an intake vacuum leak, or needing an electronic throttle idle relearn procedure.
If you recently cleaned your throttle body, the computer is still compensating for old carbon restriction. Perform an ECU Idle Air Volume Relearn procedure (or complete 3 drive cycles) to reset baseline idle back to 650-750 RPM.
Interactive Symptom Pinpoint Troubleshooter
Answer 2 diagnostic tests to isolate the exact component failure for P0507.
Did the high idle begin immediately after you sprayed cleaner into the throttle body?
Live Scanner & Multimeter Benchmark Values
Compare your live OBD-II PID sensor data against OEM factory operating specs for P0507.
| Monitored Parameter / Sensor PID | Healthy OEM Operating Range | Fault Threshold (Triggers P0507) |
|---|---|---|
| Target Idle RPM (Park / Neutral) | 650 – 750 RPM | > 900 RPM triggers P0507 flag |
| Throttle Position Sensor (TPS) at Closed Idle | 0.4V – 0.8V (typically ~10% to 14% absolute) | > 18% closed indicates mechanical binding or bad stop screw |
| Manifold Absolute Pressure (MAP) at Idle | 8 – 14 in. Hg (vacuum) | < 7 in. Hg confirms massive intake vacuum leak |
Symptoms Associated with P0507
Drivers typically observe the following symptoms when the ECM flags P0507:
Common Root Causes & Statistical Probability Matrix
Statistical breakdown of what triggers this code based on automotive repair shop data.
Step-by-Step Diagnostic & Repair Procedure
Follow this logical order to isolate and repair P0507 before spending money on costly parts.
Step 1: Inspect & Wipe Throttle Body Carbon Ridge
Remove intake duct. Spray cleaner onto a microfiber towel (never spray directly onto electronic motor housing). Wipe the black carbon ring where the throttle butterfly touches the bore.
Step 2: Check PCV Valve & Shake Test
Unscrew the PCV valve and shake it. If it does not rattle crisply, it is gunked up and stuck open, allowing continuous false air into the manifold. Replace with OEM PCV valve.
Step 3: Execute the ECU Idle Relearn Sequence
Turn off all accessories (A/C, headlights, radio). Start engine and allow to reach 190°F operating temperature. Hold at 2,000 RPM in Park for 2 minutes, then let idle in Drive for 3 minutes. The computer will relearn target idle.
Vehicle-Specific Failure Trends & Technical Bulletins
Real workshop failure patterns reported by mechanics across popular makes and models for P0507.
Nissan Altima / Maxima / 350Z (3.5L & 2.5L)
Honda Civic / Accord / CR-V
Chevrolet Silverado / Tahoe (Vortec 5.3L / 6.0L)
Dave Miller, ASE Master Tech
ASE L1 Certified Master ReviewerASE Certified Master Automobile Technician (A1-A8) & L1 Advanced Engine Performance • 24 years automotive diagnostic experience
“Do not forcefully push open modern electronic drive-by-wire throttle butterfly plates with your fingers while key is on—you will strip the internal plastic gears.”