Code
C0560
Generic
C — Chassis
Brake Pressure Sensor A Missing Calibration
Views:
UK: 21
EN: 40
RU: 20
AI status
Completed
Completed
100%
Causes
- New or replaced brake pressure sensor not calibrated to ABS module
- ABS/brake control module lost or corrupted calibration data
- Intermittent or failed sensor output (open, short, stuck)
- Damaged wiring or poor connector connection between sensor and module
- Low/unstable battery voltage during calibration or system operation
- Failed or incorrect module reflash/programming after service
Symptoms
- ABS / traction control / brake warning lamp illuminated
- Reduced or disabled ABS/ESC functionality
- Service brake system message on dash
- Noisy or abnormal brake system behavior during ABS events
- DTC stored and refusal to complete system self-test or calibration
What to check
- Read and record all stored codes and freeze frame data from ABS module
- Verify vehicle battery voltage stable (13.0–14.5 V) during testing and calibration
- Visual inspection of brake pressure sensor connector and wiring for damage, corrosion or loose pins
- Check for related network/communication codes (U‑codes) to rule out module comms issues
- Confirm whether a recent service or sensor replacement was performed
- Verify available calibration data/flags in ABS module using manufacturer scan tool
Signal parameters
- Sensor signal type: typically analog voltage (0–5 V) or frequency depending on design
- Expected idle/zero pressure output: low voltage near 0.5–1.0 V for many sensors (varies by make)
- Signal increases proportionally with brake hydraulic pressure; should be smooth without dropouts
- CAN/diagnostic flags: calibration flag or sensor learned flag present in ABS module
- During active calibration the scan tool shows status messages and target values
Diagnostic algorithm
- Retrieve and document C0560 and any related codes. Note freeze frame and vehicle state when code set.
- Verify battery condition and charge; ensure ignition is ON and voltage stable during tests.
- Perform a careful visual inspection: connectors, wiring harness, sensor mounting and hydraulic fitting for leaks or damage.
- Using a capable scan tool, check the ABS module for calibration/learn status for Brake Pressure Sensor A. Some modules list a learn/completed flag.
- Measure sensor output with a meter or scope while applying pedal pressure or using a pressure gauge. Confirm the signal is present, changes smoothly and is within manufacturer-expected range.
- If sensor output is valid but module shows missing calibration, attempt the manufacturer-specified sensor calibration/learn procedure with an OEM-level scan tool.
- If calibration cannot be completed, check for wiring continuity and resistance between sensor and module, and repair any open/shorts.
- If wiring and connectors are good but calibration still fails, replace the brake pressure sensor with a correct OEM part then perform calibration.
- If a module replacement or software update was recently performed, verify the module was correctly programmed and that the correct software/calibration files are installed.
- Clear codes, perform a controlled road test and re-scan. If code returns, escalate to module-level diagnostics or manufacturer service information for software/firmware issues.
Likely causes
- Sensor was replaced or removed and calibration step not performed
- Calibration memory in ABS module erased or corrupted
- Connector pins bent/corroded or wiring harness damaged
- Sensor itself has failed and does not present expected signal/profile
Fault status
Status
C0560 — Brake Pressure Sensor A: Missing calibration/learn data. ABS module cannot validate sensor calibration.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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