C0573Brake Pressure Sensor C Circuit/Open
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- 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
- Likely causes
- LikelyLoose, corroded or pushed-back pin at the sensor or module connector
- PossibleBroken signal, supply or ground wire in the harness
- RareInternal open circuit in the pressure sensor
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.