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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 4T65-E - DTC PO218 Through DTC P2534) >> DTC P0851 or P0852 >> Diagnostic Aids

Diagnostic Aids

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It is possible for this DTC to set due to a stack-up or misalignment issue between the IMS and the park/neutral switch, where no electrical fault is present. Ensure the gear shift selector cable is properly adjusted and there are no service bulletins that address this concern before replacing components.