Skip the auto shop - Our mechanics make house calls

Symptoms of a Bad or Failing Cruise Control Vacuum Bleed Switch

vacuum bleed switch

The cruise control feature is an optional feature found on many road going vehicles. When activated, it will automatically maintain the set vehicle speed and acceleration without the need for the driver to step on the accelerator pedal. This increases fuel efficiency as well as reduces driver fatigue. The cruise control system is wired with several redundant switches that will deactivate the system when they are tripped, to stop the vehicle from accelerating so that the driver can safely apply the brakes and shift gears.

One of these redundant switches is the cruise control vacuum bleed switch. Some cruise control systems use a vacuum operated servo to hold the vehicle at a steady speed. The switch is mounted on the brake pedal and tripped when the pedal is depressed. When the switch is tripped the vacuum is released from this servo, releasing the throttle so that the vehicle can safely decelerate. As the vacuum bleed switch is the one controlled by the brake pedal, one of the most important pedals in operating a vehicle, it is an important switch to the proper functionality of the cruise control system and any issues with it should be serviced.

1. Cruise control does not disengage when pedal is pressed

The most common symptom of a problem with the cruise control vacuum bleed switch is a cruise control system that does not disengage when the brake pedal is depressed. The switch is mounted at the base of the pedal and deactivates the cruise control system when the brake pedal is depressed so that the driver does not have to brake against an accelerating engine. If stepping on the pedal does not switch off the cruise control system, then that may be a sign that the switch has failed.

2. Cruise control disengages on its own intermittently

Another symptom of a potential problem with the cruise control vacuum bleed switch is a cruise control system that disengages intermittently without the brake pedal being depressed. If the cruise control system is intermittently self-disengaging, then this may be a sign that the switch may be having an internal or wiring issue that may be tripping the switch even when the pedal is not depressed.

3. Hissing noise coming from under the dash

Another symptom of a possible problem with the cruise control vacuum bleed switch is a hissing noise coming from underneath the dash. For some vehicles, the vacuum is routed directly to the switch on the pedal underneath the dash. If the switch or any of the hoses break, it may cause a vacuum leak which will negatively affect the operation of the cruise control system.

For vehicles equipped with them, the cruise control vacuum bleed switch is an important component of the cruise control system. It allows the driver to have an instantaneous way of deactivating the cruise control system just as they are about to slow down, and is very important to the ease of use and operation of the cruise control system. For this reason, if you suspect that your cruise control system may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic. They will be able to determine if your vehicle needs a cruise control vacuum bleed switch replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: Vibrations when I come to a stop

Hi and thanks for contacting YourMechanic. The last engine mount that was not replaced needs to be replaced. Even if it looks good, this doesn't mean that it is reliable. That will help with more of the vibrations. The...

Q: Cruise control not working

Hi. There are quite a few things that could be causing this issue. The control switch position is sent to the steering angle sensor via the clockspring in the steering column. Then the steering angle sensor sends the cruise control...

Q: Key won't turn in 2003 Saturn L200

This is a very common problem with the type of vehicle you have. If your ignition key looks worn down at all the key will need to be replaced. On some occasions the lock cylinder will need to be replaced...