P0507 Code: Meaning, Symptoms, Causes, and How to Fix (Nissan, Honda, Jeep & More)

What is the P0507 Code?

P0507 Code: Idle Control System RPM Higher Than Expected.

In Simple Terms: Your car's engine is idling faster than the computer (ECU) expects it to. This usually happens when your car is stopped at a red light, in neutral, or in park, but the engine keeps running at a higher speed than normal. In short, your engine is "idling too high." The main manifestation is that the vehicle speed does not match expectations.

Common Symptoms of a P0507 Code

• Abnormally High Idle (Intuitive): Idle speed is significantly higher than normal and may fluctuate or be unstable.
• Poor Driving Experience: Gear shifts cause noticeable jerking or lurching, and the engine may shudder when braking.
• Reduced Performance: Fuel consumption increases significantly, there's a louder-than-usual roar from the engine bay, and cold start RPMs spike abnormally.
• Check Engine Light Illuminated (Direct Signal): The check engine light turns on.

What Causes the P0507 Code?

The DTC P0507 code usually happens because the engine is taking in too much extra air, making it hard for the ECU to keep the idle speed within the normal range. This triggers the code.

• Carbon and Dirt Buildup: The most common cause is carbon or dirt in the throttle body or the idle air control (IAC) valve.
• Intake System Leaks (Vacuum Leaks): Common leak points include old vacuum hoses (like brake booster lines), intake manifold gaskets, and the PCV (Positive Crankcase Ventilation) valve or its tubing.
• Component Failures: Problems with the IAC valve, electronic throttle body, or throttle position sensor can also trigger P0507.

When you encounter code P0507, you should first check and clean the throttle body. This fixes more than half of the cases. If the problem continues, check for vacuum leaks and related control components in order. Following this sequence helps you solve the issue with the least cost and time.

Related Reading: PCV Valve Explained: What It Does, Signs of Failure, and How to Replace It

Is It Safe to Drive With a P0507 Code?

You can drive short distances, but you should get it fixed as soon as possible.Here are the key points to keep in mind:

• The risk is relatively low for short-term driving (e.g., to the repair shop or back home). You are likely to experience symptoms like high idle speed and increased fuel consumption. In the short term, this typically won't cause immediate, critical damage to the engine's core components (like pistons or the crankshaft), and the vehicle will maintain basic operability. However, if you must drive, stay alert and allow for greater following and braking distances.
• Safety risks of long-term neglect: In situations requiring precise speed control—such as in stop-and-go traffic, parallel parking, or navigating narrow roads—the excessively high idle can cause the vehicle to lurch or surge unexpectedly, increasing the risk of rear-end collisions or other impacts. Furthermore, the persistent drive force from the high idle can partially counteract the braking effect, meaning you might need to apply greater brake pressure, especially when the transmission is in Drive (D), to bring the vehicle to a complete stop.

The eobd P0507 is not a dire emergency that requires you to immediately abandon the vehicle, but it is a clear warning to seek repairs promptly.

How to Diagnose a P0507 Code: A Step-by-Step Guide

Generally, the root causes of the P0507 code are related to the engine intake system or idle control components.

Step 1: Confirm the Symptoms

Start the car and let it warm up to normal operating temperature (about 5–10 minutes). Check the tachometer to see if the RPM stays higher than 700–900 (normal idle range). Observe if the car jolts or surges when in Drive (D) or Reverse (R). Also, check if the "Check Engine" light is on. Record these visible symptoms for reference.

Step 2: Read Data with an OBD2 Scanner (Key Step)

Use an OBD2 scanner to view real-time engine RPM and sensor data. This helps identify whether the issue is caused by the throttle body, IAC valve, vacuum leaks, or other sensors.

Step 3: Physically Inspect Common Problems

• Check the Throttle Body: Remove the air filter and look for carbon buildup or oil deposits on the throttle plate. With the engine off, gently push the throttle plate to see if it sticks.
• Check the Vacuum System: Inspect intake hoses and connections for cracks or looseness. While idling, spray a small amount of soapy water on suspect areas. If the RPM changes, a vacuum leak is likely.
• Check the PCV Valve: Remove and shake it. You should hear a “click” inside. No sound or sticking means the valve needs replacement.

Step 4: Verify the Repair

After any repair (cleaning or part replacement), use the OBD2 scanner to clear the codes. Warm up the car again and check if the idle RPM and fuel trim values in the live data return to normal. Perform a road test to ensure jolting or surging is gone. If no codes appear, the initial repair is successful.

Best Tools to Diagnose the P0507 Code

The most direct and effective way to diagnose a P0507 code is by using an OBD2 scanner. With a scanner, you can read fault codes, view live data, and reset the idle learning values, which helps you quickly find the root cause.

Why You Need an OBD2 Scanner to Handle P0507

1. Read and Clear Codes: Quickly confirm whether the P0507 code exists and check for any other related codes.
2. View Live Data: Monitor engine RPM, IAC valve position, throttle plate opening, and more. This helps determine whether the problem is caused by a dirty throttle body, a faulty sensor, or a vacuum leak.
3. Reset Idle Learning: After cleaning the throttle body or replacing parts, you can reset the idle learning values with the scanner to restore normal idle speed.

Recommended ANCEL Diagnostic Tools for Different Users

• Beginner Users: Basic auto code readers like ANCEL AD310 / AD410. These simple scanners can read and clear P0507 codes, are easy to use, and offer excellent value for money.
• Professional / Advanced Users: Advanced diagnostic tools like ANCEL FX2000 / V6 series(such as V6 pro hd). These support full-system diagnostics, powerful active tests (e.g., controlling the IAC valve), online programming, and brand-specific functions for Volkswagen, Audi, and more.

For most car owners, ANCEL AD310 or AD530 models are more than enough to handle P0507 diagnostics. They allow you to complete the full process from reading codes and viewing live data to verifying repairs.

How to Fix the P0507 Code (DIY and Professional Repairs)

DIY Fixes You Can Try

1. Clean the Throttle Body (common and Fixes 50%+ of cases)：Remove the air intake tube and use a throttle body cleaner and a soft cloth to clean the plate and inside walls.
After reinstalling, you may need to do an idle relearn using a driving procedure or an OBD2 scanner.
Estimated cost: $5–$20 (cleaner only)

2. Check and Clean the Idle Air Control Valve (IAC Valve)：This applies to older cars that still use a separate IAC valve, such as older Honda, Toyota, and GM vehicles.
Remove the valve and clean carbon and dirt from the needle and air passages.
Estimated cost: $55–$220 (cleaner + replacement if needed)

3. Check and Fix Vacuum Leaks：Look for cracked or loose vacuum hoses. While the engine is running, spray carb cleaner around suspected leak spots. If the RPM changes, that area is leaking.
Estimated cost: $0–$50 (for a replacement hose)

4. Check and Replace the PCV Valve：Remove the PCV valve and shake it. If you hear a clicking sound, it’s OK. If not, replace it.
Estimated cost: $15–$50

DIY Repair Checkpoint

After any repair, use an OBD2 scanner to clear the P0507 code.
Warm up the engine and take a short drive to confirm the idle is stable and the code does not return.

When You Should Seek Professional Repair

If DIY steps don’t solve the high idle issue—or if you run into more complex problems—you should get help from a mechanic.

Seek professional help when:

• You have a vacuum leak that is hard to find (may require a smoke test).
• The electronic throttle body is failing.
• Sensors or wiring may be bad.
• The ECU needs software updates or service.

Typical Professional Repair Costs

• Diagnostic check: $80–$120

• Throttle body cleaning: $80–$200

• IAC valve replacement: $150–$400 (parts + labor)

• Throttle body replacement: $400–$1000+

• Vacuum leak diagnosis/repair: $100–$300 (depends on leak location)

Key Takeaway

Always start with cleaning the throttle body and performing an idle relearn.
It’s the cheapest option and fixes most P0507 cases.
If the idle is still too high or unstable, and the repair goes beyond basic DIY, letting a professional mechanic handle it is the safest and most cost-effective choice.

P0507 Code in Different Car Brands (Nissan, Honda, Chevy, VW, Hyundai, Jeep)

Summary:

While the root causes of the P0507 code vary slightly across different car brands, the overall trend is nearly consistent:

• Dirty throttle body, IACV/PCV malfunctions, and vacuum leaks are the three most common categories of causes.
• If the idle speed remains abnormally high after cleaning the throttle body, an idle relearn procedure is usually required (especially emphasized for Nissan and Volkswagen models).
• If accompanied by multiple fault codes related to air flow or fuel mixture, it is recommended to use a diagnostic scanner for more detailed data stream analysis.

How to Prevent the P0507 Code

• Clean the throttle body regularly (most critical)
• Inspect the PCV valve and vacuum hoses
• Clean the MAF sensor regularly (applicable to most vehicle models)
• Maintain the electronic throttle system (especially important for Nissan, VW, and Chevy)
• Use high-quality engine oil and perform regular maintenance
• Avoid frequent short trips and prolonged idling
• Conduct regular checks with an OBD2 scanner

Frequently Asked Questions (FAQ) about P0507

Will Cleaning the Throttle Body Fix P0507?

Yes. Throttle body carbon buildup is the most common cause of the P0507 code. Cleaning the throttle body and performing an idle relearn often restores normal idle speed.

• If the issue is caused by a dirty throttle body preventing the valve from fully closing, cleaning usually fixes the problem.

• However, if the cause is a vacuum leak, a faulty PCV valve, or a sensor problem, cleaning the throttle body alone may not resolve it.

• It’s recommended to clear the code with an OBD2 scanner after cleaning, then perform a test drive to verify. If the code returns, further inspection of other components is needed.

Why is My Idle RPM Unstable and How to Fix？

• Throttle body carbon deposits → Carbon deposits hinder the proper closure of the throttle valve, leading to inaccurate air intake → Clean the throttle body.
• Vacuum leaks → Unmetered air enters through cracked or loose hoses → Inspect hoses and repair cracks.
• Stuck PCV valve → The valve fails to open/close normally, causing abnormal crankcase ventilation → Replace the PCV valve.
• Dirty Mass Airflow (MAF) sensor → Inaccurate sensor readings mislead the ECU's fuel injection calculations → Clean with specialized MAF cleaner.
• Faulty IAC valve (older models) → The valve gets stuck in different positions → Clean or replace it.
• Weak spark plugs or ignition system → Aging components → Inspect and replace consumables.

Which Cars are More Likely to Experience a P0507 Code? 

Certain brands are more susceptible to P0507 due to sensitive throttle body designs or vacuum system layouts:

• Nissan / Infiniti: Electronic throttle bodies are highly sensitive, requiring an idle relearn procedure after cleaning.
• Honda: IAC valve and throttle body carbon deposits are common root causes.
• Chevrolet/GMC: Frequently occurs in trucks and SUVs like the Silverado, typically due to vacuum leaks or a dirty MAF sensor.
• VW/Audi: TSI and FSI engines are particularly vulnerable to throttle body carbon buildup, and their PCV systems are a known failure point.
• Hyundai/Kia: Typical causes include a dirty throttle body or intake hose leaks.

What Initial Steps Should I Take When the P0507 Code is Detected?

1. Check for Immediate Symptoms: Pay attention to whether the idle speed is excessively high, if there is jerking when shifting gears, if the Check Engine light is illuminated, or if the brake feel is different.
2. Use an OBD2 Scanner: Confirm that the code is indeed P0507 and check for any additional codes that might provide further clues.
3. Perform a Visual Inspection: Open the hood and look for any obvious issues: disconnected vacuum hoses, cracked intake hoses, or a loose air filter box lid.
4. Decide on Next Action:These findings will determine your next steps:
   • If the car is drivable, carefully proceed to a repair facility.
   • If the symptoms are severe (e.g., violent surging), it is safer to have the vehicle towed.

How Can You Tell If Your Idle Is Too High?

• Tachometer: The normal warm idle speed for most cars is between 600 and 900 RPM. If your needle consistently stays at 1000 RPM or higher when in Park (P) or Neutral (N), it’s too high.
• Engine sound: When the car is stopped, you’ll hear a noticeably louder roar or hum from the engine bay.
• Physical feel: You may feel increased vibration in the steering wheel, seats, or the entire vehicle.
• OBD2 scanner check: Use an OBD2 scanner to view real-time RPM and compare the ECM’s target idle speed with the actual idle speed.
• Driving behavior: When shifting from Park to Drive or Reverse, the car may lurch forward, and when you come to a stop, it may feel like it’s "pushing" against the brakes.

Other codes

P0430

P0420

P0113

P1101