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Home / DTC / P0613 — Transmission control module processor

P0613 — Transmission control module processor

Detailed page for trouble code P0613.

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Code

P0613

LAND ROVER P — Powertrain

Transmission control module processor

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

Causes

  • Internal TCM hardware failure (processor, memory, PCB)
  • Corrupted or failed TCM software/firmware
  • Low or intermittent supply voltage to the TCM
  • Poor or intermittent ground connection at the TCM
  • CAN / serial communication faults or bus short
  • Connector corrosion, water ingress or wiring harness damage

Symptoms

  • Transmission warning, TCM or MIL illuminated
  • Transmission may go to limp/limited-gear mode
  • Erratic, harsh or missing shifts
  • Loss of communication with TCM in diagnostic tool (no response)
  • Vehicle may crank but not select gears or drive properly
  • Other modules report communication errors on the same bus

What to check

  • Read all stored and pending codes from all control modules; note freeze-frame data
  • Check battery voltage with ignition ON and engine running (stable ~12–14.6 V)
  • Inspect fuses and power/ignition supply to TCM
  • Visually inspect TCM connector and wiring for corrosion, bent pins, damage or water
  • Check and measure ground continuity and resistance from TCM ground to chassis
  • Check CAN bus for wiring damage, proper termination and idle voltages

Signal parameters

  • Module supply voltage: ~12 V with ignition ON, 13–14.6 V with engine running (vehicle dependent)
  • Ignition-switched supply present when key in RUN
  • Ground resistance: low (should be
  • CAN bus idle voltages: CAN_H ~2.5–3.5 V, CAN_L ~1.5–2.5 V (difference ~0 V recessive, differential ~0 V?); check with proper scope
  • TCM should respond to diagnostic requests within expected time (no long delays)
  • No excessive current draw from TCM when powered

Diagnostic algorithm

  1. Confirm the code: Clear codes, then reproduce conditions to see if P0613 returns. Note if code is permanent or intermittent.
  2. Battery/charging check: Measure battery resting voltage and with engine running. Charge or replace battery if low; confirm charging system output.
  3. Visual inspection: Disconnect battery, inspect TCM connector, pins and harness for corrosion, corrosion, water damage, or rodent damage. Repair wiring as needed.
  4. Power/ground tests: Backprobe TCM power and ground pins. Verify stable supply voltage and low resistance ground. Repair any high resistance or intermittent connections.
  5. Communications check: Use a scan tool/oscilloscope to check CAN bus signals and verify other modules on the same bus. Repair bus faults or replace damaged terminations.
  6. Wiring continuity: Perform pin-to-pin continuity checks between TCM connector and power/ground/fuse/PCM as applicable.
  7. Reflash/reprogram: If wiring and power are good and the module responds intermittently, check for available technical service bulletins and consider reflashing the TCM software per manufacturer procedure.
  8. Module swap/bench test: If allowed by manufacturer and after confirming wiring/power, replace TCM with known-good unit or have module bench-tested. Reprogram/configure new module to vehicle as required.
  9. Final verification: After repair or replacement, clear codes and verify normal transmission function and that P0613 does not return under all operating conditions.

Likely causes

  • Failed TCM module requiring replacement or reflash
  • Weak battery or charging system producing undervoltage
  • High resistance ground or poor chassis/engine ground at module
  • Open/short on power feed or ignition-switched supply to TCM
  • Damaged CAN bus wires, short to battery or ground, or missing termination
  • Incomplete or failed software update/flash

Fault status

⚠️ Status
TCM internal processor fault detected. The module logged an internal execution or hardware error and may be unresponsive or communicating intermittently. This condition can force limp mode or disable normal transmission control until corrected.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1-3 hours

Similar codes

P0600 P0601 P0606 P0612 P060A
320

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