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Home / DTC / B1658 — EEPROM Checksum Error

B1658 — EEPROM Checksum Error

Detailed page for trouble code B1658.

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Code

B1658

HUMMER B — Body

EEPROM Checksum Error

Brand: HUMMER
Type: B — Body
Views: UK: 8 EN: 11 RU: 3
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Interrupted programming or module reflash (power loss during write)
  • Failed or degraded EEPROM/flash memory inside the control module
  • Battery voltage low or unstable during a write event
  • Permanent damage from water, heat, or impact
  • Corroded or loose connectors/power supply to the module
  • Software bug or incorrect calibration file loaded

Symptoms

  • Related body system functions inoperative, intermittent, or reset to defaults (e.g., convenience features, HVAC settings, locks)
  • Stored DTC(s) for the affected module and possibly communication (U) codes on other modules
  • Loss of user settings (seat/mirror presets, radio presets)
  • Module may not respond to diagnostic tool or show incorrect software/calibration IDs

What to check

  • Connect a capable dealer-level or professional scan tool and read freeze frame and full module DTC list
  • Check vehicle battery state-of-charge and charging system voltage (should be ~12.6 V key off, >13.5–14.5 V engine running)
  • Inspect module connectors and harness for corrosion, damage, or loose pins
  • Look for signs of water intrusion, heat damage, or prior repairs at the module location
  • Attempt to clear the code and cycle ignition; note if it returns immediately
  • Check for related U-codes (lost communication) that could point to network/power problems

Signal parameters

  • Module software/calibration part number (SW/Cal ID)
  • EEPROM/checksum value reported by scan tool (if available)
  • Last programming timestamp or service history (if stored)
  • Battery/ignition supply voltage to module (V)
  • CAN or LIN bus traffic for the module (communication present/absent)
  • Other module DTCs present concurrently

Diagnostic algorithm

  1. Record all DTCs and module information with a full system scan; note related communication codes
  2. Verify good battery voltage and charger/maintainer if needed; ensure stable supply before any programming
  3. Inspect module connectors, grounds and harness for corrosion, damage or loose pins; repair as needed
  4. Clear the code and cycle ignition; if code returns immediately, proceed to next steps
  5. Check service history for recent reprogramming or battery disconnection events that could have caused an interrupted write
  6. Attempt to reprogram/reflash the module with the correct OEM software/calibration using a supported scan tool and stable power source
  7. After reflash, erase DTCs and retest vehicle functions; verify the checksum/code does not return
  8. If reprogramming fails or the code returns after correct reflash, consider replacing the module and perform proper coding/vin programming and relearns as required
  9. If replacement is performed, confirm all related modules are communicating and perform system tests to verify the original symptom is resolved

Likely causes

  • Failed or corrupted EEPROM within the affected body/control module
  • Incomplete or failed reprogramming event (power interruption or wrong file)
  • Low/unstable battery voltage during a write operation
  • Connector corrosion or poor ground causing intermittent writes

Fault status

⚠️ Status
Stored (historical) — EEPROM checksum mismatch detected in the module. Non-volatile data appears corrupted or invalid; may cause loss of module functions.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1659 B1604 U0100 U0121 P0606
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Code

B1658

Other B — Body

Seat Driver Rear Up Circuit Short To Ground

Brand: Other
Type: B — Body
Views: UK: 18 EN: 22 RU: 16
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Interrupted programming or module reflash (power loss during write)
  • Failed or degraded EEPROM/flash memory inside the control module
  • Battery voltage low or unstable during a write event
  • Permanent damage from water, heat, or impact
  • Corroded or loose connectors/power supply to the module
  • Software bug or incorrect calibration file loaded

Symptoms

  • Related body system functions inoperative, intermittent, or reset to defaults (e.g., convenience features, HVAC settings, locks)
  • Stored DTC(s) for the affected module and possibly communication (U) codes on other modules
  • Loss of user settings (seat/mirror presets, radio presets)
  • Module may not respond to diagnostic tool or show incorrect software/calibration IDs

What to check

  • Connect a capable dealer-level or professional scan tool and read freeze frame and full module DTC list
  • Check vehicle battery state-of-charge and charging system voltage (should be ~12.6 V key off, >13.5–14.5 V engine running)
  • Inspect module connectors and harness for corrosion, damage, or loose pins
  • Look for signs of water intrusion, heat damage, or prior repairs at the module location
  • Attempt to clear the code and cycle ignition; note if it returns immediately
  • Check for related U-codes (lost communication) that could point to network/power problems

Signal parameters

  • Module software/calibration part number (SW/Cal ID)
  • EEPROM/checksum value reported by scan tool (if available)
  • Last programming timestamp or service history (if stored)
  • Battery/ignition supply voltage to module (V)
  • CAN or LIN bus traffic for the module (communication present/absent)
  • Other module DTCs present concurrently

Diagnostic algorithm

  1. Record all DTCs and module information with a full system scan; note related communication codes
  2. Verify good battery voltage and charger/maintainer if needed; ensure stable supply before any programming
  3. Inspect module connectors, grounds and harness for corrosion, damage or loose pins; repair as needed
  4. Clear the code and cycle ignition; if code returns immediately, proceed to next steps
  5. Check service history for recent reprogramming or battery disconnection events that could have caused an interrupted write
  6. Attempt to reprogram/reflash the module with the correct OEM software/calibration using a supported scan tool and stable power source
  7. After reflash, erase DTCs and retest vehicle functions; verify the checksum/code does not return
  8. If reprogramming fails or the code returns after correct reflash, consider replacing the module and perform proper coding/vin programming and relearns as required
  9. If replacement is performed, confirm all related modules are communicating and perform system tests to verify the original symptom is resolved

Likely causes

  • Failed or corrupted EEPROM within the affected body/control module
  • Incomplete or failed reprogramming event (power interruption or wrong file)
  • Low/unstable battery voltage during a write operation
  • Connector corrosion or poor ground causing intermittent writes

Fault status

⚠️ Status
Stored (historical) — EEPROM checksum mismatch detected in the module. Non-volatile data appears corrupted or invalid; may cause loss of module functions.
🔴 Repair difficulty: Hard
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1659 B1604 U0100 U0121 P0606
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