Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

P0851

Ignition voltage is between 9-18 volts.
DTCs P0601, P0602, P0603, P0604, P0602F, P182A, P182C, P182D, P182E, P182F, or P1915 are not set.

P0852

Ignition voltage is between 9-18 volts.
DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0121, P0122, P0123, P0601, P0602, P0603, P0604, P062F, P0722, P0723 P1820, P1822, P1823, P1825, P1826, or P1915 are not set.