What they do
A lambda sensor is an oxygen sensor that fits
into the exhaust system. Its purpose is to send a voltage
signal to the ECU relevant to the oxygen content of the exhaust
gasses. The ECU uses this information to continually adjust
the engine’s fuelling requirements.
Range
Fuel Parts UK offer an ever increasing range of over 500 direct
fit Lambda part numbers plus our range of universal sensors.
All Fuel Parts UK Lambda sensors come with full fitting instructions
and are covered by our comprehensive 12 month warranty.
Symptoms of failure
MOT emissions failure, high emissions, excessive fuel consumption
and Cat failure are all symptoms that can be associated with
Lambda sensor failure. Possible illumination of the vehicle’s”check
engine” lamp on the dash board. The Lambda sensor has
a limited service life and its operation deteriorates over
a period of time. The response time of the sensor is usually
a good measure of the Lambda’s condition and this should
be regularly checked as part of the vehicle’s service
routine.
Maintenance
No maintenance of the Lambda sensor is required and there
are no internally serviceable parts. Should the sensor’s
operation deteriorate then it should be considered to have
reached the end of its serviceable life, cleaning the sensor
tip will not rejuvenate it. It is important that the engine
management system and the vehicle’s emissions be regularly
serviced and checked. For more information regarding this,
please consult your vehicle owner’s manual.
Typical location
Mounted in the exhaust system manifold or front pipe in a
position that is as close to the engine as possible. Can have
one to seven wires although three and four wires are the most
common applications. Later (2000 on) vehicles may have two
sensors, one before the catalytic converter and one after
it. Likewise vee configuration engines may have one sensor
per bank.
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