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Home / DTC / B2312 — Software Failure

B2312 — Software Failure

Detailed page for trouble code B2312.

33,912codes
59brands
11,451generic
22,461specific
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Code

B2312

HUMMER B — Body

Software Failure

Brand: HUMMER
Type: B — Body
Views: UK: 18 EN: 35 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corrupted or incomplete software/firmware (failed reflash or interrupted update)
  • Internal module memory failure (corrupt non-volatile memory)
  • Low or unstable battery voltage during programming or operation
  • CAN bus or power supply faults causing communication errors during software operations
  • Mismatched or incorrect calibration/software level installed
  • Water/damage or connector/cable faults affecting the module

Symptoms

  • Stored B2312 or related software/error DTCs in one or more modules
  • Feature(s) controlled by the affected module inoperative or intermittent
  • Instrument cluster or message center may show service messages or module not responding
  • Possible loss of communication with the affected module on a scan tool
  • No engine drivability change in many cases (if body/module related), but some vehicle functions may be affected

What to check

  • Connect a full-function OEM-level scan tool and read all module DTCs and freeze-frame data
  • Record software/calibration IDs and current VIN software level for the affected module
  • Check battery state-of-charge and charging system; ensure stable voltage (recommended >12.4 V for reflash)
  • Inspect module connectors and wiring for corrosion, damage, or water intrusion
  • Check CAN bus continuity and resistance; verify no low-impedance loads or short to ground/power
  • Review service bulletins/repair instructions for known software issues or required reprogramming procedures

Signal parameters

  • Module software/calibration ID (SW ID / CID)
  • CRC or checksum verification status
  • Module internal error counters or status flags (software integrity fail)
  • CAN bus message timeouts or malformed frame counts
  • Battery voltage and supply rail voltages during module power-up and reflash
  • Presence/absence of diagnostic response to standard UDS/KWP requests

Diagnostic algorithm

  1. Record all codes and vehicle details. Note which module reported B2312 and any accompanying codes.
  2. Verify battery condition and charging system. Charge or connect a stable battery support (recommended >12.4 V) before any reprogramming.
  3. Inspect module connectors, wiring harness, and surrounding area for water, corrosion, or physical damage. Repair as needed.
  4. Use an OEM-level scan tool to read module software/calibration IDs and attempt a communication test. Note communication status.
  5. Check CAN bus health: verify proper termination, continuity, and absence of short circuits or bus errors. Repair bus faults first.
  6. Search manufacturer databases/TSBs for B2312 and required software updates or special procedures for this model/year.
  7. If no wiring or bus faults and correct file exists, attempt module reprogramming/reflash per factory procedure using correct VIN-specific calibration. Ensure stable power throughout.
  8. After reflash, clear DTCs and perform full system scan. Verify software IDs match expected values and test affected functions.
  9. If reflash fails or DTC returns immediately, perform a vehicle-wide network scan for additional faults and consider module recovery procedures (safe-mode recover, boot/recover tools) per factory service manual.
  10. If software recovery is unsuccessful and module continues to report internal software/memory faults, replace the module and program new module with correct software and configurations. Retest and clear codes.
  11. Document all actions, software levels before/after, and obtain OEM support if needed before module replacement.

Likely causes

  • Interrupted/failed PCM/body module reprogramming due to low battery or lost connection
  • Software image checksum or CRC verification failure at module startup
  • Module hardware beginning to fail (memory/processor) after repeated reprogram attempts
  • Incorrect software file flashed (wrong vehicle or VIN-specific calibration)
  • Damaged wiring or connectors causing corrupted data on the CAN bus

Fault status

⚠️ Status
Module detected internal software/firmware integrity failure (checksum/CRC or firmware error). Reprogramming or module replacement may be required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 3.0 hours

Similar codes

B2310 B2311 B2313 B2315 U0100 U0073
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

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Code

B2312

LAND ROVER B — Body

Horizontal sensor in passenger mirror - circuit failure

Brand: LAND ROVER
Type: B — Body
Views: UK: 10 EN: 24 RU: 14
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corrupted or incomplete software/firmware (failed reflash or interrupted update)
  • Internal module memory failure (corrupt non-volatile memory)
  • Low or unstable battery voltage during programming or operation
  • CAN bus or power supply faults causing communication errors during software operations
  • Mismatched or incorrect calibration/software level installed
  • Water/damage or connector/cable faults affecting the module

Symptoms

  • Stored B2312 or related software/error DTCs in one or more modules
  • Feature(s) controlled by the affected module inoperative or intermittent
  • Instrument cluster or message center may show service messages or module not responding
  • Possible loss of communication with the affected module on a scan tool
  • No engine drivability change in many cases (if body/module related), but some vehicle functions may be affected

What to check

  • Connect a full-function OEM-level scan tool and read all module DTCs and freeze-frame data
  • Record software/calibration IDs and current VIN software level for the affected module
  • Check battery state-of-charge and charging system; ensure stable voltage (recommended >12.4 V for reflash)
  • Inspect module connectors and wiring for corrosion, damage, or water intrusion
  • Check CAN bus continuity and resistance; verify no low-impedance loads or short to ground/power
  • Review service bulletins/repair instructions for known software issues or required reprogramming procedures

Signal parameters

  • Module software/calibration ID (SW ID / CID)
  • CRC or checksum verification status
  • Module internal error counters or status flags (software integrity fail)
  • CAN bus message timeouts or malformed frame counts
  • Battery voltage and supply rail voltages during module power-up and reflash
  • Presence/absence of diagnostic response to standard UDS/KWP requests

Diagnostic algorithm

  1. Record all codes and vehicle details. Note which module reported B2312 and any accompanying codes.
  2. Verify battery condition and charging system. Charge or connect a stable battery support (recommended >12.4 V) before any reprogramming.
  3. Inspect module connectors, wiring harness, and surrounding area for water, corrosion, or physical damage. Repair as needed.
  4. Use an OEM-level scan tool to read module software/calibration IDs and attempt a communication test. Note communication status.
  5. Check CAN bus health: verify proper termination, continuity, and absence of short circuits or bus errors. Repair bus faults first.
  6. Search manufacturer databases/TSBs for B2312 and required software updates or special procedures for this model/year.
  7. If no wiring or bus faults and correct file exists, attempt module reprogramming/reflash per factory procedure using correct VIN-specific calibration. Ensure stable power throughout.
  8. After reflash, clear DTCs and perform full system scan. Verify software IDs match expected values and test affected functions.
  9. If reflash fails or DTC returns immediately, perform a vehicle-wide network scan for additional faults and consider module recovery procedures (safe-mode recover, boot/recover tools) per factory service manual.
  10. If software recovery is unsuccessful and module continues to report internal software/memory faults, replace the module and program new module with correct software and configurations. Retest and clear codes.
  11. Document all actions, software levels before/after, and obtain OEM support if needed before module replacement.

Likely causes

  • Interrupted/failed PCM/body module reprogramming due to low battery or lost connection
  • Software image checksum or CRC verification failure at module startup
  • Module hardware beginning to fail (memory/processor) after repeated reprogram attempts
  • Incorrect software file flashed (wrong vehicle or VIN-specific calibration)
  • Damaged wiring or connectors causing corrupted data on the CAN bus

Fault status

⚠️ Status
Module detected internal software/firmware integrity failure (checksum/CRC or firmware error). Reprogramming or module replacement may be required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 3.0 hours

Similar codes

B2310 B2311 B2313 B2315 U0100 U0073
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

B2312

Other B — Body

Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure

Brand: Other
Type: B — Body
Views: UK: 37 EN: 90 RU: 36
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corrupted or incomplete software/firmware (failed reflash or interrupted update)
  • Internal module memory failure (corrupt non-volatile memory)
  • Low or unstable battery voltage during programming or operation
  • CAN bus or power supply faults causing communication errors during software operations
  • Mismatched or incorrect calibration/software level installed
  • Water/damage or connector/cable faults affecting the module

Symptoms

  • Stored B2312 or related software/error DTCs in one or more modules
  • Feature(s) controlled by the affected module inoperative or intermittent
  • Instrument cluster or message center may show service messages or module not responding
  • Possible loss of communication with the affected module on a scan tool
  • No engine drivability change in many cases (if body/module related), but some vehicle functions may be affected

What to check

  • Connect a full-function OEM-level scan tool and read all module DTCs and freeze-frame data
  • Record software/calibration IDs and current VIN software level for the affected module
  • Check battery state-of-charge and charging system; ensure stable voltage (recommended >12.4 V for reflash)
  • Inspect module connectors and wiring for corrosion, damage, or water intrusion
  • Check CAN bus continuity and resistance; verify no low-impedance loads or short to ground/power
  • Review service bulletins/repair instructions for known software issues or required reprogramming procedures

Signal parameters

  • Module software/calibration ID (SW ID / CID)
  • CRC or checksum verification status
  • Module internal error counters or status flags (software integrity fail)
  • CAN bus message timeouts or malformed frame counts
  • Battery voltage and supply rail voltages during module power-up and reflash
  • Presence/absence of diagnostic response to standard UDS/KWP requests

Diagnostic algorithm

  1. Record all codes and vehicle details. Note which module reported B2312 and any accompanying codes.
  2. Verify battery condition and charging system. Charge or connect a stable battery support (recommended >12.4 V) before any reprogramming.
  3. Inspect module connectors, wiring harness, and surrounding area for water, corrosion, or physical damage. Repair as needed.
  4. Use an OEM-level scan tool to read module software/calibration IDs and attempt a communication test. Note communication status.
  5. Check CAN bus health: verify proper termination, continuity, and absence of short circuits or bus errors. Repair bus faults first.
  6. Search manufacturer databases/TSBs for B2312 and required software updates or special procedures for this model/year.
  7. If no wiring or bus faults and correct file exists, attempt module reprogramming/reflash per factory procedure using correct VIN-specific calibration. Ensure stable power throughout.
  8. After reflash, clear DTCs and perform full system scan. Verify software IDs match expected values and test affected functions.
  9. If reflash fails or DTC returns immediately, perform a vehicle-wide network scan for additional faults and consider module recovery procedures (safe-mode recover, boot/recover tools) per factory service manual.
  10. If software recovery is unsuccessful and module continues to report internal software/memory faults, replace the module and program new module with correct software and configurations. Retest and clear codes.
  11. Document all actions, software levels before/after, and obtain OEM support if needed before module replacement.

Likely causes

  • Interrupted/failed PCM/body module reprogramming due to low battery or lost connection
  • Software image checksum or CRC verification failure at module startup
  • Module hardware beginning to fail (memory/processor) after repeated reprogram attempts
  • Incorrect software file flashed (wrong vehicle or VIN-specific calibration)
  • Damaged wiring or connectors causing corrupted data on the CAN bus

Fault status

⚠️ Status
Module detected internal software/firmware integrity failure (checksum/CRC or firmware error). Reprogramming or module replacement may be required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 3.0 hours

Similar codes

B2310 B2311 B2313 B2315 U0100 U0073
6,014

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