P057B

Code

LAND ROVER P — Powertrain

Brake pedal position sensor circuit range performance

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 23 EN: 38 RU: 22

AI status

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Page language: EN

Causes

Open or short in BPPS wiring or connector
Corroded, loose or damaged sensor connector or terminals
Failed or intermittent brake pedal position sensor (potentiometer or Hall-effect)
Incorrect reference or ground voltage to sensor
Faulty ABS/BAS/PCM due to internal fault or software issue
Physical obstruction, sticking or mechanical wear in pedal assembly

Symptoms

DTC P057B stored and warning light on (ABS/BAS/ESC or general brake warning)
Cruise control disabled or unavailable
Reduced engine torque or limp mode on some vehicles
Brake lights may not operate correctly or could be on constantly
Unusual or no response from brake-assist features or regenerative braking
Brake pedal feel may be normal or may exhibit intermittent changes

What to check

Read freeze frame and live data with a capable scan tool; view BPPS PID and related brake switch PIDs
Check for additional codes in ABS, BCM, PCM or other modules
Visually inspect brake pedal area, sensor and connector for damage or contamination
Backprobe sensor connector; check reference voltage, signal voltage and ground with ignition on
Wiggle wiring harness while monitoring live data to reproduce issue
Check CAN bus and module communication for errors

Signal parameters

Reference voltage: typically 5 V (verify with vehicle manual)
Signal voltage: varies proportionally with pedal travel — commonly ~0.5–4.5 V (type-dependent)
Ground: near 0 V (low impedance)
Signal should change smoothly and consistently with pedal movement; no sudden jumps or drops
Update rate: sensor/ECU publishes at regular intervals (scan tool will show frequency/timestamps)

Diagnostic algorithm

Retrieve and record all stored and pending codes from all modules. Note freeze-frame data and any conditions when the code set.
Attempt to replicate the fault using live data while operating the pedal slowly and through full travel. Note signal behavior.
Perform a visual inspection of the pedal assembly, sensor mounting and connector for corrosion, damage or contamination.
Backprobe the BPPS connector: verify reference voltage, signal voltage at rest and at full travel, and good ground. Compare to specified ranges.
If signal is out of range or intermittent, inspect wiring harness for opens/shorts; repair or repair connectors as needed.
Wiggle test harness and connector while monitoring signal to identify intermittent faults.
If wiring and power/ground are good but signal remains incorrect, bench-test or replace the BPPS per manufacturer procedure.
After repairs, clear codes and perform function/test drive, monitoring live PIDs to confirm correct operation and that DTC does not return.
If DTC persists after sensor replacement and wiring verified, test/replace the controlling module only after confirming module inputs/outputs and software level with dealer-level diagnostics.

Likely causes

Failed BPPS (most common)
Damaged/frayed wiring between sensor and module
Poor connector contact (corrosion, bent pins)
Loss of sensor reference voltage or ground
Module input (ABS/PCM) fault or lost CAN bus data

Fault status

⚠️ Status

Brake pedal position sensor circuit range/performance — P057B stored by control module. May disable cruise and affect braking assistance.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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P057B — Brake pedal position sensor circuit range performance