P1572

Code

LAND ROVER P — Powertrain

Brake pedal sensor out of self-test range

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 30 EN: 34 RU: 23

AI status

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Page language: EN

Causes

Faulty brake pedal position sensor (wear or internal failure)
Damaged or corroded electrical connector or wiring harness (open, short, intermittent)
Poor ground or weak reference supply to the sensor
Sensor misalignment, mechanical binding or foreign debris at the pedal pivot
Intermittent module input or CAN/bus communication fault
Software/calibration error or incomplete module coding

Symptoms

Brake/ABS warning lamp or driver information message related to brake system or traction control
Cruise control or adaptive cruise disabled
Auto start/stop may be unavailable
Brake lights may be intermittent or not operate correctly
Engine torque management or shift interlock events (reduced functionality)
Possible inability to enter/exit certain drive modes or service warnings at startup

What to check

Retrieve freeze frame and full fault memory with a capable scan tool; note any coexisting codes
Confirm vehicle battery voltage is within specification during test (engine running and key on)
Visually inspect brake pedal area, sensor mounting, and pivot for damage or debris
Inspect sensor connector for corrosion, water, damaged pins, or poor retention
Check wiring harness for chafing, pinched sections, or recent body repairs near pedal area
Backprobe connector and measure reference, ground and signal while actuating pedal

Signal parameters

Sensor supply/reference: typically 5 V reference (confirm with service manual)
Signal output: typically 0.5–4.5 V DC per channel (varies with pedal travel); both channels should track and be within ~0.2 V of each other at same pedal positions
At rest (pedal released) typical voltage often 0.5–1.5 V depending on design; fully depressed typically 3.5–4.5 V (confirm factory values)
Internal resistance (if specified by manufacturer) — consult OEM data for cold resistance checks
No rapid dropouts, spikes or bus errors on live-data graph during pedal travel

Diagnostic algorithm

Connect scan tool and read all stored and pending codes; record freeze-frame data and live data for brake pedal sensor channels
Verify battery voltage is stable (≥12.2 V key on, ≥13.5 V running) — low voltage can cause self-test failures
Visually inspect sensor, connector, and harness at pedal for damage, corrosion, water ingress, or loose pins; repair any obvious issues
Clear codes and perform a pedal actuation self-test while watching live data; note if the code returns and compare both channels for agreement
Backprobe connector: measure reference voltage (often 5 V), ground continuity, and each channel voltage at rest and during slow/full pedal travel; look for noise, dropouts or mismatched outputs
Perform wiggle test on harness while monitoring live data to reproduce intermittent faults; inspect for voltage changes or loss of signal
If wiring and supply are good but sensor outputs are out of range or inconsistent, replace the brake pedal position sensor per OEM procedure
After replacement, perform any required calibration/learning procedure with scan tool; clear codes and confirm successful self-test and absence of DTC on road test
If replacement did not clear fault and wiring and module inputs are verified, check module grounds, CAN communications and consider control module diagnostics or software update as per technical service information

Likely causes

Failed dual-channel brake pedal position sensor (one or both channels out of range)
Damaged harness pin (corrosion, bent pin, water ingress) causing intermittent/incorrect voltage
Lost 5 V reference or ground to the sensor
Mechanical problem with pedal pivot or sensor mounting causing out-of-range travel
ABS/BCM/ECU input circuit fault or internal module failure

Fault status

⚠️ Status

Brake pedal position sensor out of self-test range — sensor signal(s) outside expected values or inconsistent during self-test.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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Repair manuals

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P1572 — Brake pedal sensor out of self-test range