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Common Wire Colour Variations.
Zirconia Sensors Fitted to 85% of vehicles on the UK roads fitted with a catalytic convertor
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One Wire Zirconia Sensor
Output 0.1 to 0.9 Volt
Colour Connection
Black - Signal |
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Two Wire Zirconia Sensor
Output 0.1 to 0.9 Volt
Colour Connection
Black - Signal
White - Earth |
Colour Connection [Alternative]
Black - Signal
Grey - Earth |
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Three Wire Zirconia Sensor
Output 0.1 to 0.9 Volt
Colour Connection
Black - Signal
White - Heater
White - Heater |
Colour Connection [Alternative]
Blue - Signal
Black - Heater
Black - Heater |
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Four Wire Zirconia Sensor
Output 0.1 to 0.9 Volt
Colour Connection
Black - Signal
Grey - Earth
White - Heater
White - Heater |
Colour Connection [Alternative]
Blue - Signal
White - Earth
Black - Heater
Black - Heater |
Titania Sensors Fitted to 10% of vehicles on the UK roads fitted with a catalytic convertor
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Three Wire
Colour Connection
Black Ref. (out)
Red Ref. (in) and Heater (+)
White Heater (-)
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250-23880
Universal Titania Sensor
Output 0 to 1 Volt*
*(See below) |
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Three Wire
Colour Connection
Black Ref. (out)
Red Ref. (in) and Heater (+)
White Heater (-) |
250-23881
Universal Titania Sensor
Output 0 to 1 Volt*
*(See below) |
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Four Wire
Colour Connection
Black Ref. (out)
Yellow Ref. (in)
Red Heater (+)
White Heater (-) |
250-24883
Universal Titania Sensor
Output 0 to 5 Volt |
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Four Wire
Colour Connection
Black Ref. (out)
Yellow Ref. (in)
Red Heater (+)
White Heater (-) |
250-24882
Universal Titania Sensor
Output 0 to 5 Volt |
Quick Check List
1. Count the number of wires on the original sensor.
2. Check the colour of the wires
a. If the sensor has black, grey, purple or white wires, it will be a Zirconia sensor.
b. If the sensor has one red wire (and or yellow) with the possible exception of some
Japanese vehicles, it will be a Titania sensor.
3. If it is a Titania sensor then check the original thread size of the sensor.
4. If you have ant doubt or query, please contact us.
* In some applications fitted with three wire Titania oxygen sensors, the output is 0 to 5 volts. |
