FixVault
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XJR
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Trouble Code Identification
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DTC P1658: Throttle Motor Power Relay On Failure
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System Default Action
System Default Action
When fault is set, ECM:
Limits throttle valve movement in response to normal accelerator pedal movement.
Limits vehicle speed to 80 MPH.
Inhibits cruise control.