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1999
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XJR
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Engine Controls - Self-Diagnostics
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Diagnostic Trouble Code Identification
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DTC P3007: ECM Ho2S Control Malfunction (Bank 1, Upstream 1)
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Possible Cause
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Possible Cause
HO2S heater failure.
HO2S sensing circuit shorted to ground or voltage.
HO2S sensing circuit open.
ECM failure.