A/F Sensor Description
WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Refer to A/F SENSOR DESCRIPTION
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.
When DTC P0032, P0052 are indicated together, it is possible that "A/F sensor heater ground circuit is open or high resistance.
When DTC P0032, P0052 are indicated together, it is possible that "A/F sensor heater ground circuit is open or high resistance.