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System and Wiring Diagram

Fig 1: HO2S Heater Control Circuit Low/High (Sensor-2, Bank-1) - System & Wiring Diagram

Courtesy of SUZUKI OF AMERICA CORP.

NOTE: When DTC P0031, P0037, P0051 and P0057 are indicated together, it is possible that HO2S heater relay circuit wire is open or short to ground.