What Does the P0507 Code Mean?

If your Check Engine Light is on and your OBD-II scanner displays P0507, your vehicle’s Engine Control Module (ECM) has detected that the engine idle speed is higher than the manufacturer intended.

Modern vehicles continuously monitor engine RPM while idling. The ECM controls idle speed using the electronic throttle body, Idle Air Control (IAC) valve (on older vehicles), and other engine management components.

When the idle speed remains significantly above the target RPM for a specified amount of time, the ECM stores Diagnostic Trouble Code (DTC) P0507.

P0507 is commonly found on Honda, Toyota, Nissan, Chevrolet, GMC, Ford, Hyundai, Kia, Subaru, BMW, Volkswagen, Audi, Jeep, Dodge, Ram, Mazda, and many other OBD-II vehicles.

Quick Answer

Item	Information
Code	P0507
Description	Idle Control System RPM Higher Than Expected
Severity	⭐⭐⭐☆☆ Moderate
Safe to Drive?	Usually yes
Common Causes	Vacuum leaks, dirty throttle body, faulty IAC valve
Estimated Repair Cost	Free–$1,200

What Is the Idle Control System?

Your engine must maintain a stable idle speed whenever your foot isn’t pressing the accelerator.

Depending on the vehicle, idle speed is controlled by:

Electronic throttle body
Idle Air Control (IAC) valve
Mass Air Flow (MAF) sensor
Intake Air Temperature (IAT) sensor
Engine Coolant Temperature (ECT) sensor
Vacuum system
ECM

Most vehicles idle between 600 and 900 RPM after warming up.

When idle speed exceeds the programmed value, the ECM stores P0507.

What Does “RPM Higher Than Expected” Mean?

The ECM continuously compares:

Actual idle RPM
Commanded idle RPM

If the engine consistently idles several hundred RPM above its target despite the ECM attempting to reduce it, P0507 is triggered.

Example:

Expected idle:

700 RPM

Actual idle:

1,200 RPM

The ECM recognizes that idle control has been lost.

Symptoms of a P0507 Code

Common symptoms include:

Check Engine Light
High idle speed
Engine revving while stopped
Idle fluctuates
Hard shifting (automatic transmissions)
Engine surging
Hesitation
Reduced fuel economy
Occasional stalling after startup

Some vehicles only exhibit an unusually high idle.

How Serious Is P0507?

Severity: ⭐⭐⭐☆☆ (Moderate)

P0507 usually won’t cause immediate engine damage.

However, prolonged operation can lead to:

Increased fuel consumption
Premature transmission wear
Difficult shifting
Higher engine temperatures
Increased emissions

Repairing the issue promptly helps restore proper engine operation.

Can You Drive With P0507?

Usually Yes

If:

Engine runs smoothly
Idle is stable
No severe surging
No overheating

Short-term driving is generally safe.

Stop Driving If

Idle exceeds 2,000 RPM
Vehicle surges unexpectedly
Engine stalls repeatedly
Multiple throttle body codes appear
Throttle becomes unresponsive

Most Common Causes of P0507

Cause	Likelihood
Vacuum leak	⭐⭐⭐⭐⭐
Dirty throttle body	⭐⭐⭐⭐⭐
Carbon buildup around throttle plate	⭐⭐⭐⭐
Faulty Idle Air Control valve	⭐⭐⭐⭐
Sticking electronic throttle body	⭐⭐⭐
PCV valve stuck open	⭐⭐⭐
Intake manifold leak	⭐⭐⭐
Faulty throttle position sensor	⭐⭐
MAF sensor issue	⭐⭐
ECM software problem	⭐

Vacuum leaks and dirty throttle bodies account for a large percentage of P0507 repairs.

Most Common Repairs

Repair	Likelihood	Average Cost
Clean Throttle Body	Very High	$20–150
Repair Vacuum Leak	Very High	$50–400
Replace PCV Valve	High	$30–150
Replace Idle Air Control Valve	High	$150–450
Replace Throttle Body	Medium	$400–1,200
Replace MAF Sensor	Medium	$150–450

Tools You’ll Need

OBD-II Scanner
Live Data Scan Tool
Throttle Body Cleaner
Digital Multimeter
Smoke Machine
Vacuum Gauge
Basic Hand Tools

Step-by-Step Diagnosis

Step 1: Scan for Additional Trouble Codes

Look for related codes including:

P0171
P0101
P0113
P0121
P0505
P2111
P2112

These often identify the underlying problem.

Step 2: Inspect the Throttle Body

Remove the intake tube.

Inspect for:

Carbon buildup
Sticky throttle plate
Oil contamination
Damaged throttle plate

A dirty throttle body is one of the most common causes of P0507.

Step 3: Check for Vacuum Leaks

Inspect:

Intake manifold gasket
Brake booster hose
PCV hose
Vacuum lines
EVAP hoses

Use a smoke machine if available.

Step 4: Inspect the PCV Valve

A PCV valve stuck open allows extra air into the intake.

Replace it if:

It sticks
It rattles excessively
It shows signs of damage

Step 5: Monitor Live Data

Review:

Idle RPM
Throttle Position
MAF readings
Fuel Trim
Idle Air Command

Positive fuel trims often accompany vacuum leaks.

Step 6: Inspect the Idle Air Control Valve (If Equipped)

Older vehicles use an IAC valve instead of electronic throttle control.

Check for:

Carbon buildup
Electrical resistance
Sticking pintle

Step 7: Perform a Throttle Relearn

Many electronic throttle bodies require an idle relearn after:

Cleaning
Replacement
Battery disconnect
ECM reset

Some vehicles relearn automatically, while others require a scan tool or specific key-on procedure.

Common Diagnostic Mistakes

Avoid these common mistakes:

Replacing the throttle body immediately
Ignoring vacuum leaks
Forgetting the throttle relearn procedure
Cleaning the throttle body improperly
Ignoring the PCV valve
Replacing sensors without testing

Always diagnose before replacing expensive components.

Vehicle-Specific P0507 Problems

Honda

Common causes:

Dirty electronic throttle body
Idle relearn needed
Vacuum leak

Popular models:

Civic
Accord
CR-V
Pilot

Toyota

Frequently caused by:

Dirty throttle body
Carbon buildup
Vacuum leaks

Chevrolet / GMC

Often related to:

Electronic throttle body contamination
PCV issues
Vacuum leaks

Ford

Common failures include:

Electronic throttle body
Intake leaks
PCV system

Nissan

Frequently associated with:

Idle air volume relearn required
Dirty throttle body
Electronic throttle control

Nissan vehicles often require a specific Idle Air Volume Learn procedure after throttle body cleaning.

BMW

Often caused by:

Vacuum leaks
Crankcase ventilation (CCV) system
Electronic throttle body

Volkswagen / Audi

Common issues:

PCV diaphragm failure
Intake leaks
Dirty throttle body

Repair Costs

Repair	Average Cost
Throttle Body Cleaning	$20–150
Vacuum Leak Repair	$50–400
PCV Valve	$30–150
Idle Air Control Valve	$150–450
Throttle Body	$400–1,200
MAF Sensor	$150–450

Related Trouble Codes

P0507 frequently appears with:

P0505 – Idle Air Control System Malfunction
P0171 – System Too Lean (Bank 1)
P0101 – Mass Air Flow Sensor Performance
P0113 – Intake Air Temperature Sensor Circuit High Input
P0121 – Throttle Position Sensor Range/Performance
P2111 – Throttle Actuator Control System Stuck Open
P2112 – Throttle Actuator Control System Stuck Closed

Frequently Asked Questions

Can a dirty throttle body cause P0507?

Yes.

Carbon buildup around the throttle plate is one of the most common causes of an abnormally high idle.

Can a vacuum leak trigger P0507?

Absolutely.

Extra unmetered air entering the engine increases idle speed and often causes P0507.

Will cleaning the throttle body fix P0507?

In many cases, yes.

However, some vehicles require a throttle body or idle relearn afterward.

Can I drive with P0507?

Usually yes.

The vehicle is generally safe to drive if the idle isn’t excessively high and no other symptoms are present.

Why is my engine idling at 1,500 RPM?

Possible causes include:

Dirty throttle body
Vacuum leak
PCV valve failure
Idle relearn needed
Faulty electronic throttle body

Final Thoughts

The P0507 Idle Control System RPM Higher Than Expected code usually points to a problem that’s allowing too much air into the engine while idling. In many cases, the solution is as simple as cleaning the throttle body, repairing a vacuum leak, or replacing a worn PCV valve. On vehicles with electronic throttle control, an idle relearn procedure may also be required after cleaning or replacing components.

Before replacing expensive parts, inspect the throttle body, check for vacuum leaks, and review live scan tool data. A systematic diagnosis can quickly identify the cause, restore a smooth idle, and prevent unnecessary repairs.

P0507 Code Explained: Idle Control System RPM Higher Than Expected