Chevy Silverado P0507: Idle Air Control – RPM Higher than Expected

P0507 It is quite common OBDII trouble code. The code will be triggered if the engine idle speed is greater than 200 rpm. The generic code means it is the same as the other codes. Chevy Silverado As any vehicle else.

P0507 Symptoms

P0507, unlike many OBDII codes, will usually be apparent to you while driving. The following are symptoms of Silverado P0507.

• The Service Engine is Soon to Be Lighted– 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 your whole car shake when you shift into gear using 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.

Chevy Silverado 0507 Diagnosis and Causes

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 not always caused by the idle air control valve.

These are the top causes of P0507 problems in Chevy Silverado. We also have a waist guide to help you troubleshoot. Be aware that model years can vary. You might start with looking at a Vacuum leak You can then move on from there.

Vacuum Leak

The Silverado will idle more often if the vacuum system is leaking. Leakage of the vacuum system allows air into the combustion chamber. This allows for slightly higher combustion rates, an increase in RPM, and the throwing of the code.

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

Vacuum leaks can be caused by bad things 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

Modern fuel-injected engines come standard with an electronic ignition system. 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 Valves (Autozone Guides)

Throttle Body

The throttle body can be opened and closed millions of times during the lifetime of a car's engine. The accumulation of dust and air can slow down the body's ability to withstand high levels of pressure. The vehicle's idle performance can be affected by this grime. 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.

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 Silverado serviced as soon as possible. We wish you all the best!