Actron CP9185 manual Following O2 Sensor Tests are available

Global OBD II Diagnostics

✓O2 sensors are located before (upstream) and after (downstream) catalyst(s). Sensors are named (xy) for their position to both cylinder banks and catalysts.

❒The O2 sensor for cylinder bank 1 has prefix 1y while O2 sensor for cylinder bank 2 has prefix 2y.

❒The O2 sensor upstream of catalyst (closest to engine) has suffix x1 while O2 sensor downstream of catalyst has suffix x2. If vehicle contains more catalysts, O2 sensor downstream of second catalyst has suffix x3 and O2 sensor downstream of next catalyst has suffix x4.

❒For example, O2S21 is upstream O2 sensor for cylinder bank 2.

The following O2 Sensor Tests are available:

		1)	Rich-to-lean sensor threshold voltage
		2)	Lean-to-rich sensor threshold voltage
		3)	Low sensor voltage for switch time
		4)	High sensor voltage for switch time
4	4	5)	Rich-to-lean sensor switch time
		6)	Lean-to-rich sensor switch time
		7)	Minimum sensor voltage test cycle
		8)	Maximum sensor voltage test cycle
		9)	Time between sensor transitions
		10) Sensor period
		11) Manufacturer specific tests

From the Special Tests Menu:

1.Select O2 Monitor Test.

•Use UP or DOWN arrow key until O2 Monitor Test is highlighted.

•Press ENTER.

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Special Tests Menu

I/M Readiness

Drive Cycle Monitor

State OBD Check

O2 Monitor Test

Diag Mon Tests

On-Board Systems

Vehicle Info

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