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Cadillac
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2005
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XLR
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls (DTC P2096 To P2636)
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DTC P2251 or P2254
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DTC Descriptors
DTC Descriptors
This diagnostic procedure supports the following DTCs:
DTC P2251 HO2S Low Reference Circuit Bank 1 Sensor 1
DTC P2254 HO2S Low Reference Circuit Bank 2 Sensor 1