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2003
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XJ8 Base
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Engine Controls - Self-Diagnostics
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Diagnostic Trouble Code Identification
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DTC P1243: Sensor Ground Malfunction
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Possible Causes
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Possible Causes
ECM to sensors reference ground circuit open (high resistance).
TPS, PPS, ECT sensors, IAT sensor or FTP sensor failure(s).