What do engine light codes P0551 and P1684 on a 2001 PT cruiser mean?
CODE PO551 -POWER STEERING PRESSURE SWITCH CIRCUIT FAILURE. CODE P1684 - BATTERY HAS BEEN DISCONNECTED.
I just got P0551 too..looks like you need to get a new switch ($30 from autozone)
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http://img.photobucket.com/albums/v70/CREWZIN/Helpful%20Photos/PSswitch.jpg
http://www.ptcruiserlinks.com/forum/tech-performance-forum/23652-po551.html
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engine light
reseted lightr 200 miles later light came on
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