Question about 2002 Jaguar X-Type

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3.o v6 jaguar changed x2 lambda sensor cleared faults for 2 mins come on again

Changed 2 now might have to change others ?????

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Had this problem before ,in fact its quite common on the S type with this engine and i think you will need to check the voltages for the heaters i find that one or the other out of the four doesnt have any 12v power ,and trying to find the correct wiring circuit is like a hidden treasure trove ,the 12v heater circuit comes from the ECU and the fault lies here so what i do to make them work and please remember iam a old fleet comercial mechanic not a dealer unit changer i make a feed from a supply via the ignition circuit this will make them work correctly for the emissions test but the light will still be on .To test the circuit remove the multiplug to the sensor and where you have two white wires this is the 12v feed ,do check the earth to make sure its ok but one of the wires is the feed and the other is the can incoperate a a fuse into the feed wire of 5 amp but a couple of connectors and a fuse of the larger type straight onto the legs ,i wouldnt advise you to take a feed from the other sensor and this could cause that circuit to go down as well ,i have no idea why this happens on these vehicles but i suspect that the chips in the ECU could be made in china and are not of the best quality .

Posted on Apr 21, 2015


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sounds like an electrical problem, the cheapest thing to check is the lambda sensor, which is located on the exhaust. this senses how much oxygen is in the exhaust gases, and tells the ecu to change the fuel to air ratio.

hope this helps.

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