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1999 BMW 528IT E39
2.8L I6 M52 Touring•RWD•AUTOMATIC•gas
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Repairs0Labor491Torque2161Fluid8DTC1210Battery1Maintenance0Recalls0
P0601high severityPowertrain

Internal Control Module Memory Check Sum Error

on 1999 BMW 528iT E39 2.8L I6 M52 Touring · RWD

What this code means

The PCM has detected a memory checksum error during self-test.

Symptoms

  • Check Engine Light
  • Erratic engine behavior
  • Possible no-start
  • Multiple system faults

Common causes

  • PCM internal failure
  • PCM programming corruption
  • Voltage spike damage
  • Water intrusion into PCM

Diagnostic steps

  1. Attempt PCM reprogramming/reflash
  2. Check for water damage to PCM
  3. Test PCM power and ground circuits
  4. Check for TSBs regarding PCM update

Repair notes

Reprogram PCM first. If error persists, replace PCM.

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