DTC P0171-B: 1/1 Fuel System Lean

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

Inspect all O2S wiring and connectors. Repair wiring and connectors as necessary. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES . If wiring and connectors are okay, perform following tests in order until problem is found:

Coolant Temperature Sensor (CTS). Perform TEST NTC-6A: CHECKING COOLANT SENSOR CALIBRATION .
Manifold Absolute Pressure (MAP) sensor. Perform TEST NTC-8A: CHECKING MAP SENSOR CALIBRATION .
Engine mechanical systems. Perform TEST NTC-13A: CHECKING ENGINE MECHANICAL SYSTEMS .
Intake Air Temperature (IAT) sensor. Perform TEST NTC-19A: CHECKING INTAKE AIR TEMPERATURE SENSOR .