C0573 code meaning
Brake Pressure Sensor C Circuit/Open
What C0573 means
C0573 is reserved for an interrupted circuit of brake pressure sensor C – a broken signal, supply or ground wire, or a connector that has lost contact. No manufacturer documents it publicly; GM, which uses C0571 and C0572 for this sensor, books an open signal line under C0572. How an open shows up depends on the input circuit: with a pull-down resistor at the module, a lost supply or signal wire drops the reading to 0 V, while a lost ground can push it above 4.7 V, as a Denso patent on vehicle pressure sensors explains. Ratiometric transducers such as Honeywell's also drive power or ground loss to a defined rail. Sensor C usually sits in the brake module or hydraulic unit, and ABS, stability control or brake assist may be switched off.
C0573 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0573
- ABS, stability or brake warning lamp on
- Pressure value missing or fixed at a rail on the scan tool
- Fault may come and go when the connector is moved
Common causes of C0573
- Most likelyLoose, corroded or pushed-back pin at the sensor or module connector
- PossibleBroken signal, supply or ground wire in the harness
- Less likelyInternal open circuit in the pressure sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor cSensor wiring
What each part of C0573 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 73 | The exact fault in that area. |
What to do next
- Note C0573 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0573
What does C0573 mean?
C0573 means "Brake Pressure Sensor C Circuit/Open". C0573 is reserved for an interrupted circuit of brake pressure sensor C – a broken signal, supply or ground wire, or a connector that has lost contact. It is a generic code, so it means the same on every make.
Is it safe to drive with C0573?
Drive gently and only to a workshop. With C0573 the car can go into limp mode (reduced power) to protect itself.
Will C0573 fail an emissions test?
C0573 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0573 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C0573 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.