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Home / DTC / P1580 — Replacement of the powertrain control module of the monitor electronic accelerator

P1580 — Replacement of the powertrain control module of the monitor electronic accelerator

Detailed page for trouble code P1580.

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P1580

LAND ROVER P — Powertrain

Replacement of the powertrain control module of the monitor electronic accelerator

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Incorrect or incomplete PCM programming/reflash after replacement
  • Software/calibration mismatch between PCM and vehicle modules
  • PCM not paired to immobilizer or VIN (security/pairing fault)
  • CAN bus or communication errors between PCM and accelerator/throttle modules
  • Faulty or intermittent wiring/connectors between accelerator pedal, throttle body and PCM
  • Low battery or poor supply/ground to PCM during installation or programming

Symptoms

  • MIL/Check Engine Light illuminated
  • Reduced throttle response or limp-home mode
  • Engine may not start or crank but not run (immobilizer related)
  • Stored history indicating PCM replacement or adaptation required
  • Codes related to accelerator pedal sensors, throttle actuator, or module communication present

What to check

  • Connect a dealer-level or capable OBD-II scan tool and read all stored and pending DTCs and freeze frame data
  • Confirm vehicle history: was the PCM recently replaced or reflashed? Note part number and software/calibration level
  • Verify VIN and part numbers in new PCM match vehicle requirements
  • Check for additional related codes (throttle, pedal, CAN, immobilizer)
  • Check battery voltage and ensure stable power (>12.4V) during testing and programming
  • Inspect PCM, throttle body and accelerator pedal connectors for corrosion, damage or loose pins

Signal parameters

  • Accelerator pedal position sensor A/B voltages (typically 0.5–4.5 V range depending on pedal position)
  • Throttle position / throttle actuator position voltage or percent
  • Throttle actuator motor current or duty cycle (when commanded)
  • CAN bus high/low voltages and message presence to PCM (approx. 2.5V idle differential)
  • Battery voltage at PCM while cranking and during relearn/programming
  • Engine RPM and vehicle speed during tests

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and pending codes with a capable scan tool; save results.
  2. Confirm if PCM was replaced or reprogrammed recently. Note replacement part number and software/calibration level.
  3. Verify battery state of charge and ensure stable power during diagnostics and programming; charge or maintain battery if required.
  4. Inspect wiring and connectors for accelerator pedal, throttle body and PCM for corrosion, loose pins, or damage; repair as necessary.
  5. Check PCM power and ground circuits for correct voltages and continuity to chassis ground.
  6. Confirm CAN bus communication: verify other modules are visible on the network and there are no bus faults.
  7. View live data: compare accelerator pedal sensor A/B readings, throttle position, and PCM commands for plausibility and correlation; look for sensor mismatches or implausible values.
  8. Verify immobilizer/key pairing status; if the PCM requires pairing, follow manufacturer procedure to program keys/immobilizer to the new PCM.
  9. Check software/calibration level against latest OEM updates; if required, reflash/reprogram PCM with correct calibration and VIN, using dealer/OEM tooling.
  10. Perform throttle/accelerator adaption/learn procedures per service manual after successful reflash or repair.
  11. Clear codes, perform functional tests and road-test to confirm the condition does not recur.
  12. If fault persists after correct software, wiring and immobilizer checks, consider replacement of PCM only after confirming root cause and with OEM-approved replacement and programming.

Likely causes

  • PCM installed but not reprogrammed to correct software/calibration level
  • Immobilizer/key not paired after PCM replacement
  • Communication loss on CAN bus (wiring, connectors or bus short)
  • Damaged connector pins or corrosion at PCM/accelerator/throttle connectors
  • Battery voltage low or KAM data cleared/corrupted during replacement

Fault status

⚠️ Status
P1580 — PCM replacement/monitor electronic accelerator: indicates configuration, communication or pairing issue related to a replaced or programmed powertrain control module and the electronic accelerator/throttle monitoring system.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

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413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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