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Oxygen Sensor

OXYGEN SENSOR VOLTAGE ⁽¹⁾

Condition

Volts

M30 (Titania)

Lean

Rich

1.5

G20 & Q45 (Zirconia) ⁽²⁾

Lean

0-0.3

Rich

0.6-1.0

⁽¹⁾	Measure voltage between oxygen sensor terminal and ground.

⁽²⁾	Measure heater resistance between terminals "A" and "C" at sensor. Resistance should be between 3-1000 ohms.