Description:

Error code ECU 000157.04 occurs when the input voltage of the fuel rail pressure sensor drops below the specified minimum, typically due to a short to ground. This condition can lead to unreliable fuel pressure readings, affecting engine performance.

Reaction:

The ECU might incorrectly adjust fuel injection, possibly leading to reduced engine performance or stalling.

Recommendations:

• Inspect Wiring for Ground Faults: Check the sensor’s wiring for any grounding issues that could cause low voltage readings.
• Test Sensor Voltage: Ensure that the voltage at the sensor aligns with the required specifications.
• Repair or Replace Electrical Components: Address any identified electrical issues by repairing or replacing wiring or the sensor itself.
• Reset ECU and Perform System Check: After correcting the issue, reset the ECU to ensure it accurately processes fuel pressure data.

Note:

Maintaining proper wiring and electrical connections is vital for the accurate operation of sensors and the overall health of the engine’s fuel system.