OBD-II code C0562 indicates that the brake pedal position (BPP) sensor's supply voltage circuit is open, meaning the sensor is not receiving the expected reference voltage from the control module. This prevents the sensor from providing accurate brake pedal position data to the vehicle's systems.
The BPP sensor itself may be internally damaged or have an open circuit, preventing it from receiving the reference voltage or sending a signal.
The wiring harness or connectors between the BPP sensor and the control module may be broken, frayed, or corroded, causing an open circuit in the supply voltage line.
A blown fuse or failed relay in the supply voltage circuit can interrupt power to the BPP sensor, triggering this code.
Loose, dirty, or corroded terminals at either the BPP sensor or the control module can cause an open circuit in the supply voltage line.
While uncommon, the control module (e.g., ABS, ECM, or body control module) may fail to provide the reference voltage due to an internal fault. This is a last-resort diagnosis after all other causes are ruled out.
While the vehicle may still be drivable, the brake system's performance may be compromised, especially in systems relying on the BPP sensor (e.g., ABS, TCS, or cruise control). It is safer to diagnose and repair the issue promptly.
No, the control module is rarely the cause of this code. Most cases are due to a faulty sensor, damaged wiring, or poor connections. The control module should only be considered after all other potential causes have been ruled out.
Many vehicles use the BPP sensor signal to disengage cruise control when the brakes are applied. If the sensor is not functioning, the system may disable cruise control as a safety precaution.
While low voltage can affect sensor performance, C0562 specifically indicates an open circuit in the supply voltage line, not a low-voltage condition. However, a weak battery or alternator should be checked as part of overall electrical system health.