Range Rover (LM) V8-4.4L (2009)
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Sensor open circuit / disconnected.
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Short circuit to vehicle supply or ground.
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Lambda ratio outside operating band.
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Crossed sensors bank A & B.
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Contamination from leaded fuel or other sources.
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Change in sensor characteristic.
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Harness damage.
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Air leak into exhaust system.
Failure Symptoms
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Default to Open Loop fueling for the particular cylinder bank
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High CO reading.
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Strong smell of H02S (rotten eggs) till default condition.
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Excess Emissions.
It is possible to fit front and rear sensors in their opposite location. However the harness connections are of different gender and color to ensure that the
sensors cannot be incorrectly connected. In addition to this the upstream sensors have two holes in the shroud, whereas the down stream sensors have
four holes in the shroud for the gas to pass through.
