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Home › Cadillac › 2005 › XLR › Repair and Diagnosis › Engine Performance › System › Engine Controls (DTC P0638 To P2095) › DTC P0687 › Conditions for Running the DTC

Conditions for Running the DTC

The battery voltage is between 9-16 volts.
The ignition switch is turned ON.
DTC P0687 runs continuously once the above conditions are met.