Ford Focus P0507: Idle Air Control – RPM Higher than Expected

P0507 This is an OBDII common trouble code. This code is usually triggered when engine idle speed exceeds 200 rpm. This code is generic, meaning it can be used for any engine. Ford Focus Like any other vehicle.

P0507 Symptoms

P0507 is not an OBDII code that will be obvious to drivers. These are some of the symptoms that can be seen in the Focus.

• Coming Soon: Service Engine Light– The reason why you are here.
• Accelerate Idle Speed– Assuming that the code has been thrown due to a legitimate issue, you should notice the engine running faster when not pushing the gas.
• Thud Going Into Drive– Transmissions really don’t like to shift from park to drive at an RPM higher than idle. When you put your vehicle into P0507, it is not uncommon to feel the entire car jerk.
• Vehicles take off quicker– With the engine idling higher, people report feeling the vehicle take off when releasing the brake pedal. It can increase the risk of driving.

Ford Focus P0507 Causes & Diagnosis

There may be many reasons for P0507. While the code specifically mentions the “Idle Air Control System”, it would be a mistake to just go ahead and replace it without a little due diligence. Often, the Idle Air Valve isn't the problem.

Below are some common problems with the Ford Focus P0507. We will also show you how to resolve them. There are many model year differences. Start by searching for the a Leakage of vacuum You can then move forward.

Vacuum Leak

The vacuum system can leak, which will cause the Focus' idle speed to rise. The vacuum system can leak, allowing more air to get into the combustion chamber. This allows for slightly higher combustion rates, which increases the RPM and toss the code.

How to find a vehicle vaccum leak (Popular Mechanics, Article)
In less than a minute, how to find a vacuum leak (2CarPros, YouTube)

Bad things can cause a vacuum leak vacuum hoseThe Take in a lot, EGR SystemYou can find it anywhere that air is flowing. It’s not hard to find a vacuum leak though. Use the resources above and you’ll find it in no time.

Valve for Idle Air Control

The majority of modern fuel injected engine are fitted with an idle air control valve. They are not all the same. If you have determined that you don’t have a vacuum leak, the IAC is a great second place to troubleshoot P0507.

How to diagnose an IAC valve (Autozone Guides)

Throttle Body

In the course of an automobile's life, the throttle body will open and close millions of time. It can collect dust from all the air passing through it. It can alter the characteristics of your vehicle's idle. When dirty, you’ll often feel the vehicle almost stall before the computer compensates and opens it a little more.

If the throttle body is damaged or not functioning properly, then the code can be thrown.

How to spot signs that your throttle body is going down (Repair Pal)
What to do if your throttle body is dirty or bad? (YouTube Auto Repair Youtube)

Conclusion

The P0507 problem is serious. Due to the unsafe nature of driving with an engine that is revving higher than it’s supposed to, we recommend having your Focus serviced as soon as possible. We wish you all the best!