#1 - idle control (demand sensing circuit wont decrease rpm to idle with no load)
#2 - engine kill switch inop
Check the small relays first, lightly tapping on them wile on may tell you the one that is bad but not all ways , if thats not it,Pull the circuit board and test or have a old tv repairman test the Diode's/resistor's on the board, if you find a bad one and do not know how to read the rating, take a digital close up picture of it and email it to one of many people selling diodes or resistor's on Ebay, buy it , solder it in.
P1512 Throttle Position Sensor Idle Switch Sense Circuit
P1513 Throttle Position Sensor Idle Switch Sense Circuit
P1514 Park/Neutral Position Switch High Load Neutral/Drive
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as you can no such code exists for a jaguar ,contact code reader manufacturer
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Same problem - kill switch does not work - no load idle does not work -
engine hunts periodically.
Any ideas? My guess is the circuit board which runs about $175.
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