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Home / DTC / P1582 — Data of available accelerator monitor

P1582 — Data of available accelerator monitor

Detailed page for trouble code P1582.

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P1582

LAND ROVER P — Powertrain

Data of available accelerator monitor

Brand: LAND ROVER
Type: P — Powertrain
AI status
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Page language: EN

Causes

  • Faulty accelerator pedal position (APP) sensor assembly
  • Open, short or high resistance in APP wiring or connectors
  • Corroded or loose connector pins at pedal, ECU or junctions
  • Loss of reference voltage or ground to the APP sensor
  • Intermittent or failed throttle/engine control module (ECM/PCM)
  • CAN/serial communication fault between pedal module and ECU

Symptoms

  • Check Engine / MIL or specific warning lamp illuminated
  • Reduced engine power / limp-home mode (throttle limited)
  • Delayed or no throttle response to pedal input
  • Inconsistent or jerky acceleration
  • Stored/other related throttle/pedal DTCs
  • Possible drivability issues at idle or under load

What to check

  • Read stored and pending DTCs and freeze-frame data with a suitable diagnostic tool
  • Verify battery voltage and grounds before diagnosis (>= 12.4 V at rest, stable cranking voltage)
  • Visually inspect pedal connector and harness for damage, corrosion, or water ingress
  • Check for communication errors on the vehicle data bus (CAN) related to pedal module
  • Monitor live APP sensor values (sensor 1 and sensor 2) while operating the pedal
  • Confirm presence of reference voltage (typically ~5 V) and ground at pedal connector

Signal parameters

  • APP reference voltage: approximately 5 V (measure at harness reference pin)
  • APP sensor outputs: typically in the ~0.5 V to ~4.5 V range across pedal travel
  • Dual-sensor correlation: sensor A and sensor B should change in expected relationship (one often increases while the other decreases or both increase but at different slopes)
  • Idle/rest voltages: sensor outputs should be stable and repeatable at rest
  • Data bus messages: accelerator position may appear as percentage (0–100%) or raw counts over CAN; loss of messages indicates comms issue

Diagnostic algorithm

  1. Connect a diagnostic scanner, read and record all codes and freeze-frame data; note any related codes.
  2. Verify battery voltage and primary engine/chassis grounds are good before electrical testing.
  3. Visually inspect the pedal assembly connector and harness for damage, corrosion, or water entry; repair as needed.
  4. With key ON (engine OFF), backprobe the pedal connector: confirm reference voltage (~5 V), ground, and both sensor outputs present and stable.
  5. Slowly depress and release the pedal while monitoring both sensor voltages/live values: verify they change smoothly across the range and maintain expected correlation (not identical or stuck).
  6. If voltages are out of range, trace wiring for opens/shorts to power or ground. Check continuity and resistance to ECU connector; repair broken wires or pins.
  7. Perform a wiggle/strain test of the harness and connectors while monitoring live data to catch intermittent faults.
  8. If wiring and voltages OK but signals invalid, swap or replace the accelerator pedal assembly (or sensor module) and retest.
  9. If pedal assembly replacement does not clear the issue, check CAN/communication lines and related modules; run module diagnostics and update ECU software if recommended by manufacturer.
  10. After repairs, erase codes, perform any required throttle/pedal adaptations or calibrations per manufacturer procedure, then road-test to confirm the fault does not return.

Likely causes

  • Damaged or contaminated pedal connector or wiring harness
  • One or both APP sensor outputs out of range or not changing with pedal travel
  • Loss of 5 V reference or ground feed to the pedal sensor
  • Faulty pedal assembly (sensor internal failure)
  • ECU communication or internal fault (less common)

Fault status

⚠️ Status
Data from the accelerator monitor (accelerator pedal position) is unavailable or out of expected correlation; the engine control unit may limit throttle response until the issue is resolved.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0 - 2.5 hours

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413

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