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Home / DTC / U0310 — Software Incompatibility With Fuel Pump Control Module

U0310 — Software Incompatibility With Fuel Pump Control Module

Detailed page for trouble code U0310.

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U0310

Generic U — Network/User

Software Incompatibility With Fuel Pump Control Module

Brand: Generic
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • FPCM programmed with incorrect or outdated software/calibration
  • Recent ECU/PCM or FPCM software update failed or was interrupted
  • Wrong replacement FPCM (incorrect part number or aftermarket unit)
  • Corrupted module flash/firmware
  • Mismatch in security/access or VIN coding after module replacement
  • CAN/LIN communication errors or bus version incompatibility

Symptoms

  • Malfunction Indicator Lamp (MIL) or dash warning related to emissions or fuel system
  • No-start or hard start conditions
  • Intermittent stalling or poor engine performance
  • Fuel pump does not run or runs erratically
  • Stored U0310 and possibly other network/communication codes
  • Reduced fuel pressure or fuel trim abnormalities

What to check

  • Read current and pending DTCs and freeze-frame data with a capable scan tool
  • Check service history for recent module replacements or software updates
  • Verify vehicle and module part numbers, software/calibration IDs and compare to OEM references
  • Inspect FPCM connectors, pins and wiring for damage, corrosion or poor ground
  • Check battery voltage and charging system stability during diagnostics/programming
  • Verify presence and integrity of CAN/LIN bus (termination, voltage levels, error counters)

Signal parameters

  • FPCM software/calibration ID and part number (SW/Cal ID)
  • Module VIN and security/coding status
  • Fuel pump commanded state (on/off request) from PCM/BCM
  • Fuel pump current draw and relay control status
  • Fuel rail pressure and fuel pressure sensor readings
  • CAN/LIN bus error counters, message frequency and timeouts for FPCM

Diagnostic algorithm

  1. Capture all current/pending U- and P-codes plus freeze-frame information. Note any concurrent communication or fuel system codes.
  2. Check service records for recent module replacement or reflash attempts. If present, confirm software files used and whether reflash completed successfully.
  3. Visually inspect FPCM connectors, harness, and ground points for corrosion, bent pins, or damage. Repair as required.
  4. Verify battery condition and ensure stable supply voltage (use jumper or charger per OEM guidance) before attempting any programming.
  5. Use a capable OEM-level scan tool to read the FPCM part number and software/calibration ID. Compare to OEM build sheet or TSB reference to confirm compatibility.
  6. Monitor CAN/LIN bus traffic while commanding the pump. Check for expected message IDs, response times, and error counters. Repair bus faults if present.
  7. If software mismatch is confirmed, reprogram the FPCM with the correct OEM software/calibration and perform any required VIN/security coding using manufacturer procedures.
  8. If reprogram fails or module appears corrupted, replace with correct OEM part and program/encode to vehicle following security access procedures.
  9. Clear DTCs and perform functional test of fuel pump operation and pressure. Road test and re-scan to ensure DTC does not return.
  10. If issue persists after correct software and wiring verified, escalate to manufacturer support or consult technical service bulletins for known software incompatibilities.

Likely causes

  • Vehicle recently had a module replaced or software reflash
  • Service attempted programming without OEM calibration files or correct tool
  • Aftermarket fuel pump/fuel pump module installed with incompatible firmware
  • Failed or incomplete reprogramming due to low battery or comms loss
  • Connector corrosion or damaged CAN/LIN wiring at the FPCM

Fault status

⚠️ Status
Software incompatibility detected between vehicle control module and Fuel Pump Control Module. FPCM software/calibration or communication does not match expected OEM configuration; fuel pump control may be inhibited or unreliable.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

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Code

U0310

HYUNDAI U — Network/User

Software Incompatibility with Fuel Pump Control Module

Brand: HYUNDAI
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • FPCM programmed with incorrect or outdated software/calibration
  • Recent ECU/PCM or FPCM software update failed or was interrupted
  • Wrong replacement FPCM (incorrect part number or aftermarket unit)
  • Corrupted module flash/firmware
  • Mismatch in security/access or VIN coding after module replacement
  • CAN/LIN communication errors or bus version incompatibility

Symptoms

  • Malfunction Indicator Lamp (MIL) or dash warning related to emissions or fuel system
  • No-start or hard start conditions
  • Intermittent stalling or poor engine performance
  • Fuel pump does not run or runs erratically
  • Stored U0310 and possibly other network/communication codes
  • Reduced fuel pressure or fuel trim abnormalities

What to check

  • Read current and pending DTCs and freeze-frame data with a capable scan tool
  • Check service history for recent module replacements or software updates
  • Verify vehicle and module part numbers, software/calibration IDs and compare to OEM references
  • Inspect FPCM connectors, pins and wiring for damage, corrosion or poor ground
  • Check battery voltage and charging system stability during diagnostics/programming
  • Verify presence and integrity of CAN/LIN bus (termination, voltage levels, error counters)

Signal parameters

  • FPCM software/calibration ID and part number (SW/Cal ID)
  • Module VIN and security/coding status
  • Fuel pump commanded state (on/off request) from PCM/BCM
  • Fuel pump current draw and relay control status
  • Fuel rail pressure and fuel pressure sensor readings
  • CAN/LIN bus error counters, message frequency and timeouts for FPCM

Diagnostic algorithm

  1. Capture all current/pending U- and P-codes plus freeze-frame information. Note any concurrent communication or fuel system codes.
  2. Check service records for recent module replacement or reflash attempts. If present, confirm software files used and whether reflash completed successfully.
  3. Visually inspect FPCM connectors, harness, and ground points for corrosion, bent pins, or damage. Repair as required.
  4. Verify battery condition and ensure stable supply voltage (use jumper or charger per OEM guidance) before attempting any programming.
  5. Use a capable OEM-level scan tool to read the FPCM part number and software/calibration ID. Compare to OEM build sheet or TSB reference to confirm compatibility.
  6. Monitor CAN/LIN bus traffic while commanding the pump. Check for expected message IDs, response times, and error counters. Repair bus faults if present.
  7. If software mismatch is confirmed, reprogram the FPCM with the correct OEM software/calibration and perform any required VIN/security coding using manufacturer procedures.
  8. If reprogram fails or module appears corrupted, replace with correct OEM part and program/encode to vehicle following security access procedures.
  9. Clear DTCs and perform functional test of fuel pump operation and pressure. Road test and re-scan to ensure DTC does not return.
  10. If issue persists after correct software and wiring verified, escalate to manufacturer support or consult technical service bulletins for known software incompatibilities.

Likely causes

  • Vehicle recently had a module replaced or software reflash
  • Service attempted programming without OEM calibration files or correct tool
  • Aftermarket fuel pump/fuel pump module installed with incompatible firmware
  • Failed or incomplete reprogramming due to low battery or comms loss
  • Connector corrosion or damaged CAN/LIN wiring at the FPCM

Fault status

⚠️ Status
Software incompatibility detected between vehicle control module and Fuel Pump Control Module. FPCM software/calibration or communication does not match expected OEM configuration; fuel pump control may be inhibited or unreliable.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0100 U0101 U0121 U0122 P0230 U0315
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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