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Code 36 & 37: (Right/Left O2 Sensor Heater Relay)

WARNING: This page is about a different car, the 1994 Mazda 929. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Trouble Code No. 36/37 Diag. Chart (R/L O2 Sensor Htr. Rly.)

Courtesy of MAZDA MOTORS CORP.