U0310: Software Incompatibility With Fuel Pump Control Module

What it means

A module reports a software version mismatch with the fuel pump control module — typically after replacing one of the modules without programming the new unit to match the rest of the network.

At a glance

• Usually lights the warning light of the system that lost communication
• Affects emissions; the car can fail an emissions test
• The engine or gearbox may go into limp mode

How it works

The fuel pump control module regulates or coordinates fuel pump operation and reports its status to the powertrain network. U0310 sets when another module detects that the fuel pump control module's software or configuration is incompatible with the version it expects, commonly after module replacement or incorrect programming.

Common causes

Most likely first.

1. Module replaced without programming
2. Wrong part number for the vehicle
3. Gateway module routing CAN messages incorrectly

Symptoms

• Multiple warning lights may illuminate
• Affected modules may go into limp mode or shut down
• Specific functions inoperative depending on module
• Diagnostic tools may show communication faults

How to diagnose it

1. Record all codes and freeze-frame information, prioritizing fuel pressure, engine stall, and fuel pump communication faults alongside U0310.
2. Check whether the fuel pump control module or another powertrain module was recently replaced or updated, and verify the installed part and software identification for the vehicle.
3. Use scan-tool data to check fuel pump module communication, commanded pump operation, and available fuel pressure readings.
4. Inspect the module's power, ground, connector, and CAN wiring for loose terminals, corrosion, damage, or poor connections.
5. Check gateway communication and CAN network condition according to the manufacturer's diagnostic procedure.
6. If communication wiring is sound, program the correct module software and configuration, then verify stable fuel pressure and operation.

Common fixes

• Repair a poor connection, damaged wiring, power, or ground at the fuel pump control module.
• Correct the module configuration to match the vehicle.
• Reprogram the fuel pump control module with compatible software.
• Replace an incorrect or faulty module with the specified unit and program it.

Can I keep driving?

Because fuel pump control may be affected, avoid driving if the engine hesitates, stalls, loses power, or is difficult to start; have the vehicle recovered if it cannot run reliably. A pump control or network problem can cause sudden loss of propulsion and may leave the vehicle unable to restart.