C05CE — Brake Master Cylinder Piston Position Sensor B Circuit Voltage Low

Voltage is low in the circuit for master-cylinder piston position sensor B. The definition concerns sensor-circuit voltage, rather than directly stating low hydraulic pressure.

Affected system: Chassis

Symptoms

• System warning may illuminate
• Affected feature may be unavailable
• Symptoms depend on the vehicle

Possible causes

• Sensor or actuator fault, wiring or connector damage, or an underlying chassis system problem
• Module power, ground, or connector fault
• Vehicle-specific mechanical or control issue

What to check

• Record all available module faults
• Identify the affected brake, stability, steering or suspension system. Compare module data with actual operation and test the named circuit using vehicle-specific service instructions.
• Compare results with vehicle-specific service information
• Verify the repair
• Identify the affected brake, stability, steering or suspension system. Compare module data with actual operation and test the named circuit using vehicle-specific service instructions.
• Repair the verified cause and rescan all affected modules

Also written as: C05CE-00, C05CE00, CO5CE (some scan tools add the fault-type byte, e.g. -00).