P0507 Code Symptoms, Causes (and Repair Cost 2022)

Diagnostic Trouble Codes (DTC) are part of a car’s Onboard Diagnostics (OBD) and tell you what current problem is affecting your engine. If you hear an abnormally loud sound from your engine when it is in idle mode, it’s possible that you could be facing a DTC P0507 error code. The issues that trigger a P0507 code are usually not severe enough to prevent you from driving your car, but they can cause some difficulties.

What does a DTC P0507 mean?

A P0507 code is a generic powertrain code that stands for “Idle Control System RPM Higher than Expected.” This OBD-II code belongs to a series of fault codes (P0505 to P0509) that pertain to a fault in the idle control system.

This code shows that the powertrain control module (PCM) has detected that the engine idle speed has exceeded the manufacturer’s pre-programmed specifications for a certain amount of time.

P0507

On a car with electronic throttle control, the electronics and sensors are responsible for helping to maintain the idle speed. When the PCM detects that the idle speed has exceeded the desired RPM, it triggers the fault code.

On average, most PCMs will trigger Code P0507 if the idle engine speed is 200 or more RPM higher than designed, and the check engine light will appear on the dashboard.

What is Idle Control System?

The Idle Air Control system is a part of the electronic throttle body assembly in most modern cars manufactured after 2000.

The main function of the idle control system is to prevent the engine from stalling when the car is in idle speed mode. It allows the car to remain on while still running other power-consuming features like air-conditioning, alternators, and more.

Idle Control system

The key component of the Idle Air Control System is the Idle Air Control Valve, which determines the amount of air that the system needs to run at an optimal level, together with the PCM.

Read More: Causes and Symptoms of Idle Air Control (IAC) Valve

Symptoms of P0507 Code

The severity level of the P0507 is low. The idle speed is going to be higher than normal when this code gets set. Additionally, the check engine light should illuminate on the dash to alert you to the problem.

Following are the most common symptoms of the P0507 trouble code:

  • The check engine light starts illuminating
  • The engine idle speed is too high
  • Rough and rapidly fluctuating idle speed
  • The engine has trouble staying on when idle. It threatens to stall
  • The engine operating noise is more than usual.
  • The car is having trouble accelerating.

Read More: Symptoms and Causes of P0506

Causes of P0507 Trouble Code

The causes of Code P0507 can vary significantly depending on location, component, and severity. It is nearly impossible to pinpoint a single cause without thorough diagnostics and inspection of the whole system.

Following are the most common causes of P0507:

  • Vacuum leak
  • Air intake leak after the throttle body
  • Leak in the EGR valve
  • Defective positive crankcase ventilation (PCV) valve
  • Loose connection or damaged wiring
  • Contaminated/damaged throttle body
  • Excessive carbon buildup in throttle air intakes
  • Failing EVAP system
  • Bad idle air control valve
  • Failed sensor
  • Irregular Power Steering Pressure
  • Short circuits in the IAC
  • PCM or data network problems

How Serious is the P0507 Code?

Low – P0507 isn’t going to stop you from driving in the majority of situations. The engine continues to run, even though the ride might be rougher.

With P0507 triggered, the engine will run with a higher idle RPM. It might also feel harsh when the transmission engages. At times, the engine idle speed might also surge unexpectedly. 

Common mistakes to avoid when fixing a P0507 code

Don’t replace any component unless you are absolutely sure that it is the reason for the P0507 code. Common mistakes include prematurely replacing the throttle body, idle air control valve, or power steering pressure switch before visual inspection or vacuum leak checks.

How to Fix the P0507 code?

  • Hook up a good OBD-II scanner to your car to start the diagnostic process. This is crucial for correctly determining which component of the car is causing the issue.
  • Use the OBD-II scanner to read the codes present in the system and confirm the presence of Code P0507.
  • Clear the codes and go for a test drive to reset the appropriate DTCs. You will want to address any related codes, as these might fix the problem. 
  • Performs a test drive of the vehicle to duplicate the malfunction.
  • Performs a visual inspection and checks for any torn vacuum line or outside air leaks
  • Inspects the throttle body for excessive carbon buildup and proper opening and closing function
  • Look for torn vacuum lines to find a leak.
  • Check the PCV valve for blockage.
  • Uses a scan tool to check the RPM while the IAC and power steering pressure switch are tested
  • The final step is the test of the charging system.
  • Once all repairs and replacements are complete, the technician clears the codes from the system and restarts it before test-driving the car for the final time.

Read More: Causes and Symptoms of P0016

How much does it cost to fix a P0507 code?

The fixing or repair cost of the P0507 trouble code varies according to the vehicle model and the labor cost. The average fixing cost of the P0507 code is from $140 to $550.

Here are the average costs of some common components:

PartsCost
Throttle body cleaning$70 to $210
Intake or vacuum leak repair$120 to $310
Idle Air Control Valve cleaning$170 to $410
Electronic throttle body replacement$480 to $1,300
Power Steering Pressure sensor replacement$170 to $330
Throttle cable adjustment$45 to $130

FAQ Section

What does idle air control system RPM higher than expected mean?

A P0507 code is a generic powertrain code that stands for “’Idle Control System RPM Higher than Expected.” It means that the engine computer has detected that the engine idle speed has exceeded the manufacturer’s pre-programmed specifications for a certain amount of time.

Can I drive with a P0507 code?

Having a P0507 trouble code will not prevent you from driving your vehicle. You’ll be able to get it to the nearest workshop without too much trouble. However, you could experience engine stalling, difficulty in starting the car, rough engagement during transmission, and continuous high noise when idling.

What Repairs Can Fix the P0507 Code?

There are a few common repairs designed to fix this trouble code, but you must always perform diagnostic testing before trying a repair. 

Following are the most common repairs that fix your vehicle’s P0507 code:

  • Clean the throttle body
  • Clean the idle air control valve
  • Replace electronic throttle body
  • Repair intake or vacuum leak
  • Replace defective sensor
  • Perform a throttle cable adjustment
  • Relearn idle air volume
  • Swap out the defective idle air control valve
  •  Inspect and clean the PCV valve 

Can a vacuum leak cause high idle?

A vacuum leak on a fuel-injected motor can cause the engine’s RPM at idle to increase. In fact, it’s possible to double the idle speed if the leak is significant enough. When a vacuum leak is detected, the O2 sensors on the engine will detect extra oxygen entering the intake manifold.

How do you fix high idle after cleaning the throttle body?

Cleaning the throttle body allows more air to enter the engine, and the computer compensates by adding more fuel. The idle will relearn if you put the vehicle in drive and allow the idle to come down with all accessories off for about two to three minutes.

Can I clean my throttle body without removing it?

Yes, it is possible to clean the throttle body without removing it. To clean the throttle body without taking it off and out of the engine, you must spray a throttle body cleaner on it and wipe it with a clean cloth or toothbrush.

To open the butterfly valve, ask someone to compress the gas pedal so you can easily clean it inside. If you are cleaning the throttle body by yourself, carefully push on the valve to open it, and be mindful of your fingers while cleaning inside.

What causes high rpm at idle?

  1. The engine overheating
  2. Damaged cooling system
  3. The fuel pressure regulator may be operating at too low of a pressure and might need to be replaced.
  4. The Ignition timing might be in need of adjusting.
Read More
  1. Symptoms and causes of bad PCM
  2. Bad EGR Sensor Symptoms and Causes
  3. Sway Bar Function and Symptoms
  4. Causes of Low Transmission Fluid
  5. Causes and Symptoms of P0012
  6. Symptoms and Causes of P0011

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