Scantool Diagnostics

P0171 System too Lean (Bank 1)

Scantool Diagnostics

Monitor GDS Data

1. Connect GDS to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.
3. Monitor the "Parameters related to air/fuel ratio (HO2S, MAF, MAP, TPS, ECTS, PCSV, Injector, etc)" on the GDS.