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Home / DTC / P0613 — TCM Processor

P0613 — TCM Processor

Detailed page for trouble code P0613.

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11,844generic
22,491specific
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Code

P0613

Generic P — Powertrain

TCM Processor

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

Causes

  • Internal TCM processor or memory failure
  • Corrupted or failed TCM software/firmware
  • Low or unstable supply voltage to the TCM (battery/ignition circuit)
  • Poor ground or high-resistance ground connection
  • Damaged or corroded TCM connector/pins or wiring harness
  • CAN/LIN serial communication faults or bus short/open

Symptoms

  • Malfunction Indicator Lamp (MIL) or transmission warning lamp ON
  • Reduced functionality of transmission — limp/drive-only mode
  • Harsh/erratic shifting or transmission stuck in one gear
  • Transmission-related gear selection faults or no shift commands
  • Intermittent or no communication with TCM using a scan tool
  • Possible vehicle starting or drivability issues if module affects engine/trans coordination

What to check

  • Read freeze frame and all stored codes (engine + transmission) with a scan tool
  • Verify battery state-of-charge and charging system before testing
  • Check for open or pending codes that indicate wiring or CAN bus faults
  • Visually inspect TCM connector and harness for corrosion, bent pins, water, or damage
  • Check fuses and relays that feed TCM power/ignition circuits
  • Attempt to communicate with the TCM via OEM scan tool and note any errors

Signal parameters

  • TCM supply voltage (key ON): normally ~11–14.5 V (should be near battery voltage)
  • Battery resting voltage: ~12.2–12.8 V (engine off); charging voltage ~13.5–14.8 V
  • Ground resistance for TCM to chassis:
  • CAN High idle voltage: ~2.5–3.5 V relative to ground (vehicle-dependent)
  • CAN Low idle voltage: ~1.5–2.5 V relative to ground (vehicle-dependent)
  • Presence of periodic CAN messages/IDs for transmission data when monitored with a bus tool

Diagnostic algorithm

  1. Record all codes and freeze frame data. Do not immediately replace parts.
  2. Verify battery condition and charging system. Recharge or replace weak battery before further testing.
  3. Clear codes and attempt to reproduce. Note whether P0613 returns and under what conditions.
  4. Inspect TCM connector, pins and wiring for corrosion, bent pins, water ingress or physical damage. Repair as needed.
  5. Check power and ignition feed circuits: verify proper voltages at the TCM connector with ignition ON and engine running.
  6. Verify TCM ground integrity: measure voltage drop to chassis while cranking/operating and repair any high resistance ground.
  7. Check CAN bus continuity and voltages at the TCM connector; use oscilloscope or CAN monitor to confirm valid messages and signal quality.
  8. Check related fuses/relays and verify other modules can communicate on the bus to isolate a bus-wide issue.
  9. If communication is intermittent, perform wiggle tests on harness while monitoring communication and look for changes.
  10. Search manufacturer technical service bulletins: apply known software updates or reprogramming procedures before module replacement.
  11. If wiring, power and communication are verified good and software update fails or the fault persists, consider replacement of the TCM. Program/configure new TCM per manufacturer procedures and perform relearns/initializations.
  12. After repair or reflash, clear codes and road-test. Re-check for recurrence and perform final confirmation with scan tool.

Likely causes

  • Failed TCM (internal electronics) detected by self-test
  • Battery voltage drop or weak battery during module operation/update
  • Corroded connector pin or bent pin at TCM
  • Open or shorted power/ignition feed to the TCM
  • Loss of CAN communication due to shorted bus or broken shield
  • Incomplete or corrupted software update

Fault status

⚠️ Status
TCM Processor Fault — internal TCM microprocessor or software error detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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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 processor or memory failure
  • Corrupted or failed TCM software/firmware
  • Low or unstable supply voltage to the TCM (battery/ignition circuit)
  • Poor ground or high-resistance ground connection
  • Damaged or corroded TCM connector/pins or wiring harness
  • CAN/LIN serial communication faults or bus short/open

Symptoms

  • Malfunction Indicator Lamp (MIL) or transmission warning lamp ON
  • Reduced functionality of transmission — limp/drive-only mode
  • Harsh/erratic shifting or transmission stuck in one gear
  • Transmission-related gear selection faults or no shift commands
  • Intermittent or no communication with TCM using a scan tool
  • Possible vehicle starting or drivability issues if module affects engine/trans coordination

What to check

  • Read freeze frame and all stored codes (engine + transmission) with a scan tool
  • Verify battery state-of-charge and charging system before testing
  • Check for open or pending codes that indicate wiring or CAN bus faults
  • Visually inspect TCM connector and harness for corrosion, bent pins, water, or damage
  • Check fuses and relays that feed TCM power/ignition circuits
  • Attempt to communicate with the TCM via OEM scan tool and note any errors

Signal parameters

  • TCM supply voltage (key ON): normally ~11–14.5 V (should be near battery voltage)
  • Battery resting voltage: ~12.2–12.8 V (engine off); charging voltage ~13.5–14.8 V
  • Ground resistance for TCM to chassis:
  • CAN High idle voltage: ~2.5–3.5 V relative to ground (vehicle-dependent)
  • CAN Low idle voltage: ~1.5–2.5 V relative to ground (vehicle-dependent)
  • Presence of periodic CAN messages/IDs for transmission data when monitored with a bus tool

Diagnostic algorithm

  1. Record all codes and freeze frame data. Do not immediately replace parts.
  2. Verify battery condition and charging system. Recharge or replace weak battery before further testing.
  3. Clear codes and attempt to reproduce. Note whether P0613 returns and under what conditions.
  4. Inspect TCM connector, pins and wiring for corrosion, bent pins, water ingress or physical damage. Repair as needed.
  5. Check power and ignition feed circuits: verify proper voltages at the TCM connector with ignition ON and engine running.
  6. Verify TCM ground integrity: measure voltage drop to chassis while cranking/operating and repair any high resistance ground.
  7. Check CAN bus continuity and voltages at the TCM connector; use oscilloscope or CAN monitor to confirm valid messages and signal quality.
  8. Check related fuses/relays and verify other modules can communicate on the bus to isolate a bus-wide issue.
  9. If communication is intermittent, perform wiggle tests on harness while monitoring communication and look for changes.
  10. Search manufacturer technical service bulletins: apply known software updates or reprogramming procedures before module replacement.
  11. If wiring, power and communication are verified good and software update fails or the fault persists, consider replacement of the TCM. Program/configure new TCM per manufacturer procedures and perform relearns/initializations.
  12. After repair or reflash, clear codes and road-test. Re-check for recurrence and perform final confirmation with scan tool.

Likely causes

  • Failed TCM (internal electronics) detected by self-test
  • Battery voltage drop or weak battery during module operation/update
  • Corroded connector pin or bent pin at TCM
  • Open or shorted power/ignition feed to the TCM
  • Loss of CAN communication due to shorted bus or broken shield
  • Incomplete or corrupted software update

Fault status

⚠️ Status
TCM Processor Fault — internal TCM microprocessor or software error detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0600 P0601 P0606 P0700 P0705
320

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LAND ROVER

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