Mazda BT-50 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. Mazda BT-50 As any vehicle else.

P0507 Symptoms

P0507, unlike many OBDII trouble codes will be easily visible while you drive. The following are symptoms of the BT-50

• 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. 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.

Mazda BT-50 - P0507 Causes and Diagnosis

Many possible causes of P0507 exist. 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.

These are the top causes of P0507 problems in Mazda BT-50. We also have a waist guide to help you troubleshoot. There are many model year differences. Start by searching for the a Vacuum leak From there, you can move on.

Vacuum Leak

The BT-50 will idle more often if the vacuum system is leaking. 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 do you find a leak in your vehicle's vaccum? (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

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 Valves (Autozone Guides)

Throttle body

In the course of an automobile's life, the throttle body will open and close millions of time. The accumulation of dust and air can slow down the body's ability to withstand high levels of pressure. 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.

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 BT-50 serviced as soon as possible. We wish you all the best!