Description:

This fault code is set when the fourth sensor supply voltage provided by the ECU is detected to be excessively high, indicative of a short to a 12-volt line. Such a condition risks damaging the sensors and other electronic components connected to this supply.

Reaction:

To prevent potential damage, the ECU may shut off the power supply to the affected sensors, potentially leading to incomplete system functionality or default operation modes.

Recommendations:

• Inspect for Voltage Irregularities: Check all associated wiring and connectors for possible sources of the high voltage.
• Test and Measure Supply Voltage: Use diagnostic tools to measure the output voltage from the ECU to the sensors.
• Repair or Replace Faulty Electrical Components: Address any identified electrical faults that could contribute to the abnormal voltage.
• Reset ECU and Perform Comprehensive Testing: After repairs, reset the ECU and thoroughly test the system to ensure that all components receive the correct voltage and function properly.

Note:

Regular maintenance and checks of the electrical system, including voltage supplies to ECU sensors, are crucial for the longevity and effective operation of vehicle systems. Prompt attention to any voltage discrepancies is necessary to avoid extensive component damage and operational failures.