C05C0

Code

Generic C — Chassis

Brake Pedal Position Sensor A Not Learned

Brand: Generic

Type: C — Chassis

Views: UK: 20 EN: 36 RU: 29

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New or replaced brake pedal position sensor not calibrated/learned
Battery disconnected or low voltage during learn procedure
Failed or intermittent BPP sensor (A)
Damaged wiring, connector corrosion, or poor connector pin contact
Faulty brake pedal sensor mounting or mechanical binding preventing expected travel
ECU/module software fault or need for updated calibration procedure

DTC C05C0 stored (Brake Pedal Position Sensor A Not Learned)
Brake system warning lamp or master warning lamp may be illuminated
Cruise control and/or driver-assist functions may be disabled
Possible limp-home or degraded drive mode depending on vehicle
Brake pedal feel may be normal if sensor electrical only; mechanical pedal issues if physical binding exists

Confirm battery voltage is healthy (12.4–12.8 V or greater with engine running) and terminals are clean/tight
Read freeze frame and live data with a scan tool to observe BPP A signal during pedal travel
Check for related BPP codes (Sensor B or correlation faults) and module/communication errors
Visually inspect sensor, connector, and wiring for damage, corrosion, or pins pushed out
Perform an ignition cycle and retry the manufacturer-specified learn/calibration procedure with a diagnostic tool
Check for OEM technical service bulletins (TSBs) or specific learn steps for this vehicle

Typical BPP sensor output: variable analog voltage in the approximate range 0.5–4.5 V as the pedal moves (dependent on manufacturer)
Supplied by a stable 5 V reference and ground from the module
Two-channel systems: Sensor A and Sensor B should change smoothly and correlate; correlation delta typically small (manufacturer-specific)
No intermittent drops to 0 V or open-circuit readings during pedal travel

Verify battery health and charge; ensure stable voltage for the duration of the procedure.
Use a scan tool to view live data: note BPP A voltage at rest, mid-travel, and full travel. Confirm smooth, monotonic change without dropouts.
Attempt the OEM BPP sensor learn/calibration procedure with a factory or capable aftermarket scan tool. Follow exact steps (ignition cycles, pedal positions, dwell times).
If learn fails, perform wiring/connector checks: backprobe the sensor connector for 5 V reference, ground continuity, and signal presence while moving the pedal.
Wiggle test wiring while watching live data to detect intermittent opens/shorts.
If supply or ground missing or signal is out of expected range, repair wiring/connectors and retest.
If wiring and power/ground are good but signal incorrect or noisy, replace the BPP Sensor A with a correct OEM/approved part.
After replacement or repair, repeat the learn procedure and clear codes. Confirm code does not return and verify proper operation during road test and re-check live data.
If learn still fails and wiring/sensor verified, check module software level and communications; consult manufacturer for module reflash or replacement if required.