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Home >> Cadillac >> 2007 >> XLR Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L (LH2) - DTC P0340 To DTC P2544 >> DTC P2544 >> Circuit/System Testing

Circuit/System Testing

Observe the DTCs in the scan tool

If DTC P0604 is set, replace the ECM.
If DTC P0604 is not set, replace the TCM.

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