P0602

Code

LAND ROVER P — Powertrain

Internal control module programming error

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 27 EN: 36 RU: 26

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Page language: EN

Causes

Failed or interrupted module reprogramming (lost power during flash)
Corrupted or incompatible software/calibration loaded into the module
Damaged or failing control module (EEPROM/flash memory fault)
Low or unstable battery voltage during programming or operation
CAN/communication errors preventing successful programming or validation

Symptoms

Malfunction Indicator Lamp (MIL) or dash warning lamp illuminated
Vehicle may enter limp mode or exhibit drivability issues
Loss of some module-controlled features or erratic behavior
Failure to start or unexpected shutdown in severe cases
Repeated code returns after clearing or after attempted reflash

What to check

Retrieve all stored DTCs and freeze frame data with a capable scan tool
Check battery state-of-charge and voltage; ensure stable >12.4 V (or as manufacturer specifies) during tests
Inspect fuses, power and ground connections at the affected module
Verify connector pins and wiring for corrosion, damage, or loose terminals
Check for other communication-related codes on CAN/diagnostic buses
Confirm current software/calibration and compare with latest manufacturer release/TSBs

Signal parameters

Module part number and software/calenaration ID (SW/Cal ID)
Vehicle VIN and VIN mismatch flags reported by module
Module serial number and hardware version
Supply voltage at module during programming attempts
CAN bus error counters / communication status
KAM (keep alive memory) status and write/erase errors (if available)

Diagnostic algorithm

Record the code history and any associated DTCs/freeze frame before clearing codes.
Verify battery voltage and health. Charge or connect a stable supply (battery charger/PSU) before any reprogramming.
Inspect power, ground, fuses and connectors at the control module. Repair any wiring or connector issues.
Check for related CAN/communication faults; repair bus wiring or module-to-bus hardware faults first.
Confirm correct software/calibration for the exact VIN and module part number using manufacturer information.
Attempt to clear the code and perform an ignition cycle; if code returns, proceed with reprogramming.
Perform a controlled reflash using the manufacturer’s diagnostic and programming tool. Ensure uninterrupted power and follow OEM reflash procedure.
If reflash fails repeatedly or reports memory errors, test module supply and internal bus lines. If hardware faults are confirmed, consider module replacement.
After successful programming, perform any required immobilizer or gateway coding/synchronization steps per manufacturer procedure.
Verify resolution by clearing codes, completing a full drive cycle, and confirming the code does not return. Document software/calibration levels applied.

Likely causes

Reflash aborted because battery fell below required voltage
Technician used incorrect software package or wrong VIN calibration
Module memory checksum failure after power loss or hardware fault
Faulty power/ground to the module or blown fuse affecting write operations
Intermittent CAN bus wiring or connector fault that corrupted programming data

Fault status

⚠️ Status

Internal control module programming error — module detected invalid or corrupted programming/calibration or an interrupted/failed reflash.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1-3 hours

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P0602 — Internal control module programming error