What does it mean when your brake light says p0504?
What does it mean when your brake light says p0504?
When Error Code P0504 is set, that means the vehicle’s computer system or PCM (powertrain control module, also known as ECM or engine control module) has detected a failure in the brake light circuit. The PCM monitors all circuits in the vehicle and checks for any abnormalities, such as lack of voltage or out of range conditions.
When to use fault code p0504 OBD II?
OBD II fault code P0504 is a generic code that is defined as “Brake switch -A/B correlation”, and is set when the PCM (Powertrain Control Module) detects a failure either in the brake light control circuit, or when one or more systems that are coupled to the brake light circuit do not activate/deactivate when…
How to know if your PCM has stored a p0504 code?
The first indication that your PCM has stored a P0504 code will likely be an illuminated Check Engine Light. Aside from this, you may also notice other symptoms, including: Pressing the brake pedal doesn’t engage or disengage the vehicle’s cruise control system. One or both brake lights will not turn on when pressing the brake pedal.
Can a p0504 code cause a failed emissions test?
In addition to causing potentially dangerous situations on the road, a P0504 code can also result in a failed emissions test. Though the brake light switch does not have a direct effect on the vehicle’s emissions, it will illuminate the Check Engine Light, which will cause the vehicle to fail an OBD-II emissions test. Need help with a P0504 code?
What does p0504 brake switch a B correlation code mean?
In this video I’ll be going over a brief description of what a p0504 brake switch a b correlation code means. And what it took to fix the brake switch on this vehicle. Is a very common cold on a lot of Mazdas and Hyundais I’ll show you where the brake light switch is located and also how to check it.
OBD II fault code P0504 is a generic code that is defined as “Brake switch -A/B correlation”, and is set when the PCM (Powertrain Control Module) detects a failure either in the brake light control circuit, or when one or more systems that are coupled to the brake light circuit do not activate/deactivate when…
The first indication that your PCM has stored a P0504 code will likely be an illuminated Check Engine Light. Aside from this, you may also notice other symptoms, including: Pressing the brake pedal doesn’t engage or disengage the vehicle’s cruise control system. One or both brake lights will not turn on when pressing the brake pedal.
In addition to causing potentially dangerous situations on the road, a P0504 code can also result in a failed emissions test. Though the brake light switch does not have a direct effect on the vehicle’s emissions, it will illuminate the Check Engine Light, which will cause the vehicle to fail an OBD-II emissions test. Need help with a P0504 code?
