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i have a code p0134 and p0134pd what does pd mean and how can i fix it?

1997 Cedillac el dorado have all codes for all four o2 sensors replaced all four, now i get all the codes again and a duplicate with a "pd". any help? a smog specialist ran a diagnostic and said the sensors have no ground so i grounded them to the chasis and all codes say no activity detected for all four sensors. as well as the "pd"

-thanks
asked Mar 5, 2011 by anonymous

1 Answer

Check the O2 sensor fuses. If the fuses are OK, then you may have a faulty powertrain control module (PCM)
answered Mar 5, 2011 by OBDIITech (2,396 points)
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