P0507
Fix within 1-2 weeksThe engine's idle speed is higher than the computer expects it to be.
Code P0507 means your engine's idle speed is too high. Common causes: Vacuum leaks (50%), dirty throttle body (35%). Drivability: Yes, safe to drive, but fix within 1-2 weeks. Repair cost: $10-$200 DIY, $150-$500 professional.
Can I Drive With P0507?
Yes, safe to drive
No restrictions, but fix within 1-2 weeks to avoid long-term issues.
Stop driving immediately if: Engine stalls frequently, significant power loss, or other warning lights illuminate.
Symptoms of P0507
- 1Engine idles too high (e.g., 1000-2000 RPM when warm)
- 2Engine surges or races when coming to a stop
- 3Poor fuel economy
- 4Engine may hesitate or stall at times
Common Causes of P0507
Parts most likely causing this code, ranked by probability
Unmetered air entering the engine after the mass airflow sensor causes the computer to increase fuel, resulting in a higher idle.
50% of P0507 cases are fixed by repairing a vacuum leak
Carbon buildup prevents the throttle plate from fully closing, allowing too much air into the engine at idle.
35% of P0507 cases are fixed by cleaning or replacing the throttle body
If equipped, a stuck-open or malfunctioning IAC valve allows too much air to bypass the throttle plate, raising the idle speed.
10% of P0507 cases are fixed by replacing the IAC valve
A PCV valve stuck open or a cracked PCV hose acts as a vacuum leak, introducing unmetered air and raising idle.
5% of P0507 cases are fixed by replacing the PCV valve or hose
Check These First (Before Buying Parts)
- Visually inspect all vacuum hoses for cracks, disconnections, or loose clamps.
- Listen for a distinct hissing sound around the engine, especially near the intake manifold.
- Remove the air intake tube and manually check if the throttle plate is closing fully; look for carbon buildup.
How to Diagnose P0507
- 1Visually inspect all vacuum hoses for cracks, disconnections, or loose connections.
- 2Listen for a hissing sound around the engine, indicating a vacuum leak.
- 3Remove the air intake tube and inspect the throttle body for carbon buildup; clean it thoroughly with throttle body cleaner.
- 4Check the PCV valve and its associated hoses for proper function and leaks.
- 5If your vehicle has an IAC valve, test its operation or inspect it for carbon buildup.
- 6Perform a smoke test to pinpoint hard-to-find vacuum leaks.
P0507 on Popular Vehicles
Honda Accord
2003-2012Commonly caused by carbon buildup in the throttle body or a failing Idle Air Control (IAC) valve. Cleaning the throttle body is a frequent fix.
70% fixed by cleaning throttle body or replacing IAC valve
Toyota Camry
2002-2011Often related to a dirty throttle body or a vacuum leak from a cracked PCV hose or intake manifold gasket.
65% fixed by cleaning throttle body or repairing vacuum leak
Ford F-150
2004-2014Frequently triggered by vacuum leaks, especially from the PCV system (hoses or valve) or intake manifold gaskets. A thorough smoke test is often necessary.
75% fixed by repairing vacuum leak or PCV system
Frequently Asked Questions
What does P0507 mean?
P0507 indicates that your engine's idle speed is running higher than the vehicle's computer expects it to be.
Can I drive with P0507?
Yes, you can drive with P0507, but you should fix it within 1-2 weeks. The primary issues are poor fuel economy and increased wear on engine components. If the high idle is severe or causes other symptoms like stalling, limit driving.
Will P0507 clear itself?
No, P0507 will not clear itself. The underlying issue causing the high idle, such as a vacuum leak or dirty throttle body, must be repaired for the code to clear. You will need to fix the problem and then clear the code with a scan tool.
How do I fix P0507 myself?
Start by visually inspecting all vacuum hoses for damage. Then, remove and thoroughly clean your throttle body with throttle body cleaner. Check your PCV valve and its hoses. If your vehicle has an IAC valve, inspect and clean it.
How much does it cost to fix P0507?
DIY repair costs range from $10-$200 for throttle body cleaner, vacuum hoses, or a PCV valve. Professional repair costs typically range from $150-$500, including diagnosis, parts, and labor.
P0507 keeps coming back - why?
P0507 keeps coming back because the root cause was not fully addressed. This often means a vacuum leak was missed, the throttle body was not cleaned thoroughly enough, or a faulty IAC valve (if present) was not replaced. A smoke test is often needed to find elusive vacuum leaks.
Will P0507 fail emissions/smog test?
Yes, P0507 will cause your vehicle to fail an emissions or smog test. The check engine light being on automatically fails the test, and a high idle can also lead to higher-than-normal emissions readings.
What's the difference between P0507 and P0505?
P0507 indicates the idle speed is too high, while P0505 specifically points to a malfunction in the Idle Air Control (IAC) system itself. P0507 is a broader code for high idle, which can be caused by many factors, including an IAC issue, but also vacuum leaks or a dirty throttle body.
P0507 on Honda Accord
On many Honda Accord models, P0507 is frequently caused by carbon buildup in the throttle body or a faulty Idle Air Control (IAC) valve. Cleaning the throttle body and checking the IAC valve are common first steps for these vehicles.
Questions to Ask Your Mechanic
Did you perform a smoke test to check for vacuum leaks?
Good answer: Yes, we smoke tested the intake system and found no leaks, or 'Yes, we found a leak at X and repaired it.'
Did you thoroughly clean the throttle body and check its operation?
Good answer: Yes, we removed and cleaned the throttle body, and confirmed the throttle plate closes completely.
If my vehicle has an IAC valve, was it inspected or tested?
Good answer: Yes, we tested the IAC valve and it's functioning correctly, or 'We found the IAC valve was stuck and replaced it.'
Repair Cost Estimate
DIY Repair
Parts only
$10-$200
Shop Repair
Parts + labor
$150-$500
Save $140-$300 by doing it yourself
Difficulty
beginner
Time
0.5-2 hours
Beginner-friendly - cleaning the throttle body or replacing a vacuum hose is a simple task for most DIYers.
Cost of Waiting
Ignoring P0507 leads to consistently poor fuel economy and increased wear on engine components due to the elevated RPMs. If the high idle is caused by a significant vacuum leak, the engine can run lean, potentially damaging oxygen sensors or even the catalytic converter, turning a $50 fix into a $1,200+ repair.
While You're In There...
You'll likely remove the air intake system to access the throttle body, making it a convenient time to replace a dirty air filter.
The PCV system is a common source of vacuum leaks that cause P0507; replacing the valve is a low-cost preventative measure.
Tools You'll Need
- Basic hand tools (screwdrivers, sockets)
- Throttle body cleaner
- Shop rags
- OBD-II scan tool (to clear code)
P0507 is a common code that often points to a simple fix like a vacuum leak or a dirty throttle body. Most repairs are straightforward and will get your engine idling smoothly again.
- Family-owned since 1957
- 990,000+ happy customers
- Fast nationwide shipping
- Easy returns
Your Next Steps
Step 1: Visually inspect all vacuum lines and the PCV system for any obvious cracks or disconnections. Listen for a hissing sound.
Step 2: If no obvious leaks are found, remove the air intake hose and thoroughly clean the throttle body with throttle body cleaner. Pay close attention to the edges of the throttle plate.
Step 3: If the code persists after cleaning and inspection, consider a professional smoke test to pinpoint hidden vacuum leaks or test the IAC valve (if applicable).