Jeep Grand Cherokee P0507: Idle Air Control – RPM Higher than Expected

P0507 It is quite common OBDII trouble code. This code is usually triggered when engine idle speed exceeds 200 rpm. The generic code means it is the same as the other codes. Jeep Grand Cherokee Like any other vehicle.

P0507 Symptoms

P0507 is not an OBDII code that will be visible while driving. The following symptoms are typical for Grand Cherokee.

• Coming Soon: Service Engine Light– The reason why you are here.
• You can use your Idle speed faster– 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. You may feel the entire vehicle shake when you shift into P0507.
• Vehicle takes off faster– With the engine idling higher, people report feeling the vehicle take off when releasing the brake pedal. Driving can become more hazardous.

Jeep Grand Cherokee P0507 Causes, Treatments

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. The code is rarely caused by the idle air control valve.

Below are the main causes of P0507 issues in Jeep Grand Cherokee. There are many model year differences. Start by searching for the a Leakage of vacuum You can then move forward.

Vacuum Leak

Leaking vacuum systems can cause Grand Cherokees to idle more. Leakage of the vacuum system allows air into the combustion chamber. The extra air allows for slightly more combustion and increases RPM. It also throws the code.

How to find a vehicle vaccum leak (Popular Mechanics, Article)
Find a Vacuum leak in under a minute (2CarPros, YouTube)

Bad things can cause a vacuum leak vacuum hoseThe Intake is endless, EGR SystemOr anywhere air can flow through. It’s not hard to find a vacuum leak though. Use the resources above and you’ll find it in no time.

Valve to control the idle airflow

The majority of modern fuel-injected engine are fitted with an idle air control valve. However, not all are. 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

The throttle body can be opened and closed millions of times during the lifetime of a car's engine. 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.

Alternativly, the code could be thrown if it is not functioning properly due to damage to the throttle body.

Here are some signs your Throttle Body is failing and what to do (Repair Pal)
How to tell if your throttle is bad or dirty (YouTube auto repair, Youtube).

Conclusion

This is an extremely serious problem. Due to the unsafe nature of driving with an engine that is revving higher than it’s supposed to, we recommend having your Grand Cherokee serviced as soon as possible. You're welcome!