P0573 OBD-II Trouble Code: Cruise Control/Brake Switch A Circuit High

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0573 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0573 code

P0573 is a diagnostic trouble code (DTC) for "Cruise Control/Brake Switch A Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0573 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0573 code definition

When the PCM stores the P0573 code, it’s because it has discovered an electrical malfunction affecting your vehicle’s cruise control brake switch “A” circuit.

What the P0573 code means

Your vehicle’s PCM works in tandem with the cruise control module to automatically control its speed. If the PCM receives input that alerts it that the vehicle can no longer control its own speed, it will initiate a test of the entire cruise control system. P0573 code gets stored once your vehicle’s PCM senses an abnormal resistance/voltage level in the cruise control brake switch circuit during this test. That feedback essentially tells it speed cannot be controlled and thus cruise control must be prohibited.

What causes the P0573 code?

By far, the most common reason for a P0573 code being stored is that the cruise control switch failed. Open or shorted circuitry inside the cruise control buttons because of spilled liquids actually occurs fairly often. This is usually enough to keep the circuitry from performing normally and, thus, triggering the P0573 code.

Other causes that may be responsible include:

That last one is probably the least likely reasons as something fairly severe usually has to happen before a fuse is blown.

What are the symptoms of the P0573 code?

The most obvious symptom of a P0573 code is that the cruise control on your vehicle will no longer work. You may also get a Check Engine Light, but that’s not always the case; a lot of models require as many as three drive cycles of the P0573 code before it will activate the light to alert you.

We just mentioned that, although rare, blown fuses can cause the code. But they can also be a symptom of the P0573 code too.

How does a mechanic diagnose the P0573 code?

Most mechanics will begin by taking an OBD-II scanner and a digital ohmmeter to perform the initial diagnosis. Then, they’ll proceed to check your vehicles wires, connectors, and other electrical components to check for some of the symptoms we mentioned earlier. They’ll also look for any signs of spilled liquid.

Common mistakes when diagnosing the P0573 code

Rare though they may be, it’s a good idea to check for fuses that may have blown either before or after the P0573 code was stored. This should be done before any serious repairs or replacements occur because both often happen due to problems that stem with a blown fuse. By simply addressing the fuse, mechanics can avoid a lot of time-consuming, expensive repairs that wouldn’t be necessary.

How serious is the P0573 code?

If you enjoy using your vehicle’s cruise control setting, then it’s essential that you have problems related to a P0573 code addressed right away or you won’t be able to use it. Of course, if a blown fuse is part of the problem, you’ll be relieved if you catch it early by taking your vehicle to a qualified mechanic. A blown fuse could be the beginning of a number of other problems too.

What repairs can fix the P0573 code?

The good news is that repairing your vehicle should be fairly simple. Generally, all you need to do is fix the damaged wires or connectors causing the problem. Worst case scenario, the blown fuse has to be fixed.

Additional comments for consideration regarding the P0573 code

Remember that, for some of you, there won’t be a Check Engine Light – at least not right away – if a P0573 code is stored. However, that doesn’t mean you have to wait to bring your vehicle in. If your cruise control isn’t responding, there’s clearly a problem and it could potentially become worse if you wait too long to get help.

Need help with a P0573 code?

YourMechanic has a team of certified mobile mechanics who can meet you at your home or office – whichever you prefer – to diagnose the problem affecting your vehicle and provide necessary and affordable prepares. Either fill out this online form or just give us a call at 1-800-701-6230 to speak with a service advisor. We’ll give you a free quote and schedule your appointment.

trouble codes
Check Engine Light
P0573

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0573 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,936

Rating Summary
3,597
169
44
25
101
3,597
169
44
25
101

Andrew

22 years of experience
23 reviews
Andrew
22 years of experience
Showed up early, made the correct diagnosis on my car after coming behind the work of another mechanic, very nice and honest.
2001 FORD ESCAPE - CHECK ENGINE LIGHT IS ON - DECATUR, GEORGIA

Jamahl

17 years of experience
746 reviews
Jamahl
17 years of experience
Very knowledgeable and friendly!
2005 CHRYSLER TOWN & COUNTRY - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

James

27 years of experience
331 reviews
James
27 years of experience
Great job. Helped me understand my issue
2000 FORD F-150 - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

Eduardo

16 years of experience
203 reviews
Eduardo
16 years of experience
On time, honest , knowledgeable!!! Can’t go wrong with him.
2009 NISSAN ALTIMA - CHECK ENGINE LIGHT IS ON - FRESNO, TEXAS

More related articles

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...

Related questions

Q: P0302 code/CEL. Spark plugs could be cause but not sure

This code relates to a misfire which may be caused by many different reasons. This may be caused by faulty spark plug wires or plugs, a faulty coil pack, faulty O2 sensors or potentially a dirty or clogged fuel injector....

Q: I have a 2004 Mercedes Benz ML350.

Hi there. Check the brakes and the wheel speed sensors to see if the are damaged or worn causing the ESP light to come on. A worn brake pad can cause the ESP light to come on as the wheel...

Q: C121C torque request signal denied and P0334 Cam shaft sensor

The cam sensor code (actually P0344), is known problem, and there is a Technical Service Bulletin (232460) that addresses this fault and repair. Check with your Dodge dealer to understand what the TSB covers or not. The C121C code has...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com