Description:

Error code ECU 001075.04 is triggered when the ECU detects that the supply voltage to the fuel pump is below 9 volts. Low voltage can result in inadequate fuel pump performance, leading to insufficient fuel delivery and potential engine performance problems.

Reaction:

The ECU may limit engine performance to prevent potential damage due to inadequate fuel supply.

Recommendations:

• Inspect Battery and Charging System: Check the battery voltage and charging system to ensure they are providing sufficient power. A weak battery or faulty alternator can cause low voltage issues.
• Examine Fuel Pump Wiring: Inspect the wiring and connectors to the fuel pump for signs of damage, corrosion, or loose connections that could cause a voltage drop.
• Measure Voltage at Fuel Pump: Use a multimeter to measure the voltage at the fuel pump terminals. Confirm that it is within the specified range (typically above 9 volts).
• Check for Voltage Drops: Identify any points in the circuit where voltage drops may occur and address them by repairing or replacing faulty wiring or connectors.
• Replace Faulty Components: If the battery, alternator, or any wiring is found to be defective, replace the necessary components to restore proper voltage supply.
• Reset ECU and Verify Operation: After resolving the low voltage issue, reset the ECU to clear the error code and test the fuel pump operation to ensure it receives adequate voltage and functions correctly.

Note:

Maintaining a stable and adequate voltage supply to the fuel pump is critical for ensuring consistent fuel delivery and engine performance. Regular inspection of the battery, charging system, and fuel pump wiring can help prevent voltage-related issues.