1.Feb.2014
Changing Front Lower Control Arm
11.Nov.2013
10.Nov.2013
24.July.2013
14.Mar.2013
Changing Rear Anti-RollBar Bushes
13.Mar.2013
Dipped (low) Beam Bulb Replacement
25.Feb.2013
MAF Sensor Repair or Replacement
15.Feb.2013
Front Brake Disc(Rotor) Replacement
30.Jan.2013
26.Nov.2012
24.June.2012
UK Insurance Group Ratings Added
14.June.2012
Diesel Vehicle Service Sheet Added
14.June.2012
Petrol Vehicle Service Sheet Added
22.Jan.2012
23.Oct.2011
Bank 2 Sensor 1 O2 Sensor
X-Type Lambda Sensor
Jaguar X-Type petrol (all years) Part Number C2S51801
Jaguar XK From A30645 - A48700
Standing facing the Flywheel end of the engine, Bank 2 is located
on the left hand side of the engine, there are two sensors one
upstream, on the engine side of the catalytic converter, and
one down stream on the exhaust side of the catalytic converter.
Bank 2 Sensor 1 is the Upstream sensor. The easiest way to locate this sensor is to follow the
lead back from the GREY connector.

Upstream Sensor connctor viewed from the front of the vehicle, with battery removed.
Bank 2 sensor 1, measures the oxygen content of the exhaust gasses as they enter the catalytic converter, the level of oxygen in the gas mixture is directly related to the 'burn' efficiency of the engine, it is converted to an electrical signal and fed back to the Engine Control Unit (ECU) to alter the fuel air mixture supplied to the engine.
The ratio of fuel to air in the combustion chamber is identified
with the Greek letter 'lambda' hence the term 'lambda sensor'
as the name given to the O2 sensors used in vehicles. Ideal
combustion of gasoline occurs when the fuel : air ratio is
14.7:1 (fuel is 6.8% of the mass of the mixture) at this
point the lambda value of 1.0 is assumed. As the lambda value
drops the fuel:air mixture is becoming richer (less air more
fuel) and conversely as the value rises the mixture is becoming
weaker (more air to fuel).
With the engine up-to normal working temperature, check the output of the sensor wire, normally black with Zirconia sensors, you should expect an output of 0.2 – 0.8 volts fluctuating between these reading approximately 2 – 3 times per second. If the output voltage is lower than this, i.e. 0 – 0.2 volts there will be a lean running or excess oxygen problem. If the voltage is higher than this, i.e. 0.8 – 1.2 volts then there will be a rich running or excess fuel fault.