Description:

This fault code is triggered when the ECU detects that the voltage in the 5-volt supply circuit for sensors is below the specified range, typically due to a short circuit to ground. This under-voltage condition can cause sensor malfunctions, affecting various monitoring and control functions.

Reaction:

The ECU may enter a fail-safe mode, limiting engine performance or certain functionality to prevent damage or unsafe operating conditions due to unreliable sensor data.

Recommendations:

• Inspect 5-Volt Supply Circuit: Look for any signs of damage, corrosion, or loose connections that could cause a short to ground.
• Measure Voltage Levels: Using a multimeter, verify the voltage output in the 5-volt circuit to pinpoint the under-voltage issue.
• Rectify Electrical Short: Repair or replace any faulty wiring or components that are causing the short circuit.
• Reset ECU and Confirm Sensor Operation: After the electrical repair, reset the ECU to clear the fault and test the system to ensure that all sensors are receiving the correct voltage and functioning properly.

Note:

A stable 5-volt supply is critical for the accurate operation of ECU sensors. Regular checks and maintenance of the electrical system are recommended to prevent voltage issues.