P0507 is the diagnostic trouble code for Idle Control System RPM Higher Than Expected. On a 2007 Honda CR-V, this means the engine is idling higher than the PCM expects, typically signaling an issue with the idle control system or related vacuum and sensor components.
Code meaning and how it affects your CR-V
Definition
P0507 indicates the idle control system is producing an idle speed higher than the target RPM set by the engine control module.
How idle control works on the CR-V
In the 2007 CR‑V, idle control is managed either by a dedicated Idle Air Control (IAC) valve or through an electronically controlled throttle body. The PCM adjusts air flow to maintain the target idle under varying engine conditions.
Common symptoms
Typical signs that the idle is too high or that P0507 is present include:
- Sustained high idle RPM when the engine is warmed up
- Rough idle or hunting idle near startup
- Stalling or misfiring when coming to a stop or at idle
- Vacuum leaks around intake hoses or throttle body
- Increased fuel consumption
Note: A Check Engine light may be on, and a diagnostic scan is needed to confirm P0507 and related data.
Likely causes
Common culprits
These are frequent contributors to elevated idle in a 2007 Honda CR‑V. Each item should be inspected and tested to determine the root cause.
- Dirty or sticking Idle Air Control (IAC) valve or passages
- Vacuum leaks in hoses, gaskets, or intake manifold
- Dirty or faulty throttle body or throttle plate
- Faulty idle speed sensor or problems with the MAF/MAP sensors
- Faulty engine coolant temperature sensor or incorrect temperature readings
- PCV valve that is clogged or leaking
- Worn or leaky intake manifold gasket
- Electrical wiring or connector problems to the IAC, MAP, or MAF sensors
In some cases, the cause may be transient or related to a cold-start condition. If the car idles high only when cold, the issue may be normal, but persistent high idle when warm warrants a check of these components.
Diagnostic steps
How to verify the cause
Follow a structured diagnostic process to identify the exact source of the elevated idle. This can help you save time and avoid unnecessary part replacements.
These steps are for a DIY-minded owner with basic tools. If you are not comfortable, consult a certified mechanic.
- Use a scan tool to verify P0507 and note any related freeze-frame data (engine temperature status, RPM, etc).
- Inspect for obvious vacuum leaks: check all hoses around the intake, PCV line, and throttle body for cracks, disconnections, or loose clamps. A quick spray of carb cleaner near hose connections while the engine runs can reveal a leak when RPM changes.
- Check the Idle Air Control valve: remove and inspect the IAC valve if accessible; clean with appropriate cleaner or replace if sticking.
- Inspect the throttle body: clean deposits on the throttle plate; ensure the throttle plate opens and closes freely and that the linkage is not binding.
- Test sensors that influence idle: MAF/MAP sensors and the engine coolant temperature sensor. Clean or replace as needed and verify readings with live data; compare with spec values for your engine.
- Check the PCV valve and associated hoses: replace if clogged or damaged, as PCV issues can cause high idle.
- Inspect for exhaust leaks around the intake manifold or EGR system if applicable; leaks can affect idle calibration.
- Clear the codes, restart the engine, and drive under varying loads to see if P0507 recurs. If it returns, escalate to professional diagnosis.
Applying this diagnostic approach helps identify whether the high idle is caused by a simple cleaning, a failed valve, a leak, or a sensor fault that requires replacement or recalibration.
Repairs and fixes
Repair options
Once you identify the root cause, these fixes cover common repairs for P0507 on the Honda CR-V. Prioritize components with visible wear or failure signs.
- Clean or replace the Idle Air Control (IAC) valve or idle control passage
- Repair vacuum leaks: replace damaged hoses, gaskets, or intake manifold components
- Clean the throttle body and ensure smooth operation of the throttle plate
- Clean or replace MAF/MAP sensors if readings are out of spec and recalibrate the ECU if necessary
- Replace a faulty engine coolant temperature sensor or verify its readings
- Replace the PCV valve and associated hoses if clogged or damaged
- Fix any intake manifold gasket leaks or EGR valve issues if applicable
- Reset the PCM by disconnecting the battery for a few minutes or using a scan tool’s reset function; then perform a road test to confirm the fix
Monitor idle after repairs and clear the code; a successful repair should return idle to the target RPM and remove P0507 from the ECU.
When to seek professional help
Professional assessment
If the cause is not obvious after these steps, or if you do not have the tools or experience to safely perform the tests, a certified mechanic can perform a more thorough diagnostic. They may use advanced test equipment to verify sensor readings, perform vacuum tests, and verify the idle system operation comprehensively.
Summary
P0507 on a 2007 Honda CR‑V signals that the idle control system is maintaining an idle speed higher than the target. The most common causes are a sticking or dirty IAC valve, vacuum leaks, throttle body deposits, and related sensor or PCV issues. A systematic approach—visual inspection, sensor data checks, cleaning, and targeted part replacement—usually resolves the problem. If the issue persists after the basic fixes, seek professional help to prevent engine wear or reduced fuel efficiency.