DTC P1101: Description

The purpose of the global air diagnostic is to detect an airflow error. When this diagnostic determines that there is an airflow error, the DTC P1101 sets immediately. When this occurs, the fuel system operates in a default state and the engine control module (ECM) performs a series of tests to determine which of the following sensors or systems is the source of the error:

• DTC P0068 throttle body airflow performance
• DTC P0101 mass air flow (MAF) sensor performance
• DTC P0106 manifold absolute pressure (MAP) sensor performance

This DTC is designed to always set with another DTC as long as the ECM has had enough time to run the series of tests.