Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: DTC P0155: HO2S Bank 2 Sensor 1 Circuit - Heater Performance (Steps 1-9)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0155: HO2S Bank 2 Sensor 1 Circuit - Heater Performance (Step 10-14)

Courtesy of GENERAL MOTORS CORP.