Subaru Outback (BR): Horn

 Low tire pressure warning light (U.S.-spec. models)

When the ignition switch is turned to the “ON” position, the low tire pressure warning light will illuminate for approximately 2 seconds to check that the tire pressure monitoring system (TPMS) is functioning properly. If there is no problem and all tires are properly inflated, the light

 DTC P0171, P0172, P0181, P0182, P0183, P0196, P0197, P0198, P0201, P0202, P0203, P0204, P0222, P0223, P0301, P0302, P0303, P0304

AR:DTC P0171 SYSTEM TOO LEAN (BANK 1) 1. OUTLINE OF DIAGNOSIS Detect fuel system malfunction by the amount of main feedback control. Diagnostic method Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor. 2. ENABLE CONDI