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Home / DTC / U2507 — Token absent from the engine management system smart accelerator

U2507 — Token absent from the engine management system smart accelerator

Detailed page for trouble code U2507.

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Code

U2507

LAND ROVER U — Network/User

Token absent from the engine management system smart accelerator

Brand: LAND ROVER
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Smart accelerator module (or engine control module) lost or missing security token/credentials
  • Module replaced or reprogrammed and not coded/paired to vehicle security
  • Corrupted module memory or failed software update
  • Loss of communication on CAN bus preventing token validation
  • Immobilizer/key transponder or gateway module fault
  • Battery disconnects or low battery during programming leading to incomplete token storage

Symptoms

  • Malfunction Indicator Lamp (MIL) or security warning illuminated
  • Reduced engine power or limp-home mode (limited throttle response)
  • Throttle pedal unresponsive or erratic response
  • Engine cranks but will not start (depending on immobilizer interaction)
  • Stored U2507 fault and possibly other communication/security U-codes
  • Cruise control or adaptive/drive-by-wire features unavailable

What to check

  • Read all stored DTCs and freeze-frame data from engine, gateway, and immobilizer modules
  • Check battery voltage (stable 12V+) and condition; verify no recent battery disconnects
  • Inspect CAN bus wiring, connectors, and module grounds for corrosion, damage or loose pins
  • Confirm whether any modules have been recently replaced or reprogrammed
  • Verify modules appear on the diagnostic tool’s module list and check for communication errors
  • Check immobilizer/vehicle security status and key recognition (IDS or equivalent tool)

Signal parameters

  • CAN bus error counters and message traffic for engine, gateway, immobilizer, and accelerator modules
  • Token/pairing status flag in engine management or accelerator module (token present/absent)
  • Throttle pedal position (raw and scaled) vs. accelerator command
  • Engine torque request / torque limiting flag
  • Module software/part numbers and programming status
  • 12V supply and ground integrity at the affected modules

Diagnostic algorithm

  1. Connect a manufacturer-level diagnostic tool and read all modules. Record U2507 and any other U or P codes and freeze-frame data.
  2. Verify battery voltage is within specification. If low, charge or replace battery before further diagnostics.
  3. Inspect physical connectors, power and ground circuits for the engine management and smart accelerator modules. Repair any damage.
  4. Check CAN bus for lost frames, shorts, or high resistance. Repair wiring faults and retest communication to all relevant modules.
  5. Use the diagnostic tool to confirm whether the smart accelerator/engine module reports a token or pairing entry. If token is absent or invalid, check module programming/version history.
  6. If a module was recently replaced or updated, confirm it was coded/paired using the manufacturer's security programming procedure. Perform module pairing/reprogramming where required.
  7. If the module reports corrupted memory or failed software, reflash/reprogram the module with the latest authorized firmware and ensure programming completes without interruption.
  8. After reprogramming or pairing, clear codes and perform a road test to confirm normal throttle behavior and that U2507 does not return.
  9. If steps above do not restore token/pairing, escalate to module replacement only after verifying replacement module can be programmed with manufacturer tools and security access.
  10. Document work and advise that repair may require dealer-level security access and proprietary programming equipment.

Likely causes

  • Recent module replacement (ECM or smart accelerator) without manufacturer security coding
  • Failed or interrupted software/firmware update on engine management or gateway module
  • CAN bus errors preventing token exchange (short, open, high resistance)
  • Faulty smart accelerator module hardware (memory corruption)
  • Immobilizer/gateway not responding or not listed on module network

Fault status

⚠️ Status
Secure token required by the engine management system for the smart accelerator is absent or not validated. This prevents authenticated communications between modules and can cause reduced engine performance or disabled throttle functions. Requires diagnosis of module programming, CAN communication, and vehicle security pairing.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0100 U0140 U0401 U1103 U1110
413

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