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Home / DTC / U2607 — Control Module Communication Error

U2607 — Control Module Communication Error

Detailed page for trouble code U2607.

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U2607

LAND ROVER U — Network/User

Control Module Communication Error

Brand: LAND ROVER
Type: U — Network/User
Views: UK: 6 EN: 10 RU: 7
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Page language: EN

Causes

  • Battery or charging system low/unstable voltage
  • Poor ground or corroded/loose connector pins
  • Damaged wiring harness or chafing causing intermittent open/short to power/ground
  • Faulty or unresponsive control module
  • Network termination fault (open/shorted CAN termination resistors)
  • Software mismatch or failed module programming

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning messages displayed
  • Loss or intermittent operation of functions controlled by the affected module
  • Unable to communicate with the affected module using a diagnostic tool
  • Multiple related U-codes present on same network
  • Vehicle may enter limp-home mode or exhibit no-start conditions (depending on module)
  • Unusual instrument cluster messages or blank displays

What to check

  • Read all stored DTCs and freeze-frame data with a capable scan tool; note related U- and B-/C- codes
  • Record battery voltage with ignition on and engine running; ensure stable >12.4V (key on) and proper charging when running
  • Visually inspect wiring, connectors and junctions for corrosion, damage, or water ingress near the reported module and along the network wiring
  • Check fuses and power feeds to the affected module(s)
  • Attempt to communicate with the module via OEM diagnostic tool; note whether it responds or times out
  • Check for other modules on same network reporting bus errors

Signal parameters

  • Battery voltage (key on/engine running) — acceptable key-on >12.4 V, running ~13.5–14.8 V
  • Module supply voltage at connector pin — matches battery/ignition feed
  • Ground resistance from module chassis pin to vehicle ground — low milliohms ideally
  • CAN bus idle voltages: CANH ≈2.5–3.5 V, CANL ≈1.5–2.5 V (approx. midline ~2.5V)
  • Differential CANH–CANL idle ≈0 V ± small noise; active differential pulses to expected amplitude
  • Bus data activity: expected message rate for the network (monitor with scan tool or scope)

Diagnostic algorithm

  1. Capture and save all DTCs and freeze frame data; identify which module or network the code refers to.
  2. Verify battery state of charge and charging system health; restore good battery connections if low.
  3. Use OEM scan tool to attempt to communicate with the target module and other modules on the same bus; note which modules respond.
  4. Perform visual inspection of connectors and wiring for the affected module and common junction points; repair corrosion/damage as required.
  5. Check fuses and power/ground at the module connector; backprobe pins to confirm proper voltages while operating diagnostic communication.
  6. Monitor CAN/CAN-FD/LIN bus traffic with a capable scan tool or oscilloscope; look for missing messages, dominant bus-off states, excessive noise, or conflicting transmitters.
  7. Measure termination resistance across CANH–CANL (ignition off) ~60Ω. If open or shorted, trace to termination resistors or modules providing termination.
  8. If bus signals are noisy or absent, isolate sections of the network by disconnecting modules or splice connectors one at a time to locate the fault.
  9. Repair wiring/connectors as found (secure, clean, replace corroded pins, repair shields), then reconnect and clear codes.
  10. If wiring and power/ground are confirmed good and the module still does not respond, consider module replacement and programming per manufacturer procedures. Verify repair by reproducing original conditions and rescanning for DTCs.

Likely causes

  • Low battery/poor battery connections causing modules to reset
  • Corroded or loose connector at the affected module or junction block
  • Physical damage to CAN/LIN wiring (chafe, rodent bite) between modules
  • Failed control module (rare compared with wiring/connectors)

Fault status

⚠️ Status
Control module communication error — the module failed to respond or bus messages were corrupted/detected as invalid. Investigate power, ground, wiring and network integrity before replacing modules.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0100 U0073 U0140 U0121 U1000
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