Description:

The error code ECU 000102.03 signifies that the input voltage at the manifold air pressure sensor is excessively high, beyond the normal specifications. This condition often points to a potential short circuit to a 12-volt source. Such a voltage discrepancy can adversely affect the sensor’s ability to accurately measure air pressure in the intake manifold, which is critical for proper engine management and efficiency.

Reaction:

The engine control unit (ECU) may enter a protective mode to prevent engine damage due to incorrect air pressure readings. This can lead to altered engine performance, such as reduced power output or erratic operation.

Recommendations:

• nspect Wiring and Connectors: Check for damaged wires or loose connectors that might be causing the short to the 12-volt source. Replace or repair any compromised wiring.
• Test Sensor Voltage: Use a multimeter to verify the voltage at the sensor. It should not exceed the manufacturer’s specified range.
• Replace Faulty Sensor: If wiring and connectors are intact, consider replacing the manifold air pressure sensor.
• Reset ECU and Clear Codes: After repairs, reset the ECU and clear the error code to see if the issue recurs.

Note:

Ensure that all electrical repairs adhere to safety standards to prevent further issues. A voltage issue at the sensor can sometimes be due to problems elsewhere in the electrical system, so a comprehensive check may be necessary.