easternraider Posted March 9, 2015 Report Share Posted March 9, 2015 Engine cranks good but will not start with both crank sensors connected. Will start with either sensor A or B disconnected. Code P083 present, engine is 4.6l vin code Y. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted March 9, 2015 Report Share Posted March 9, 2015 This is truly strange. It should need both crank sensors to run. Run the OBD codes and post them here and that will likely tell the tale. See the link in my signature block for a Caddyinfo page on how to run them from your A/C buttons without a code reader. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
barczy01 Posted March 10, 2015 Report Share Posted March 10, 2015 I can fax you the alldata repair for the code P083, you just have to diag the code and its just a matter of ohming stuff out. Link to comment Share on other sites More sharing options...
easternraider Posted March 10, 2015 Author Report Share Posted March 10, 2015 Ohm readings taken at ignition control module connector C1 1117 ohms between pins a & b, 1125 ohms between pins e & f. No short to power or ground on the circuits. Ohm reading for wire 647 between icm c4 pin a and pcm 3f1 0, no short to power or ground . Cam sensor ohm readings taken at icm c2 1596 ohms between pins a & b, no short to power or ground. Link to comment Share on other sites More sharing options...
rockfangd Posted March 10, 2015 Report Share Posted March 10, 2015 unplugging one of the sensors trips a limp mode which adjusts readings accordingly to be able to limp the vehicle to shop or home. Ecm uses info from all other sensors to compensate for the sensor that dropped. You may have a 5v reference problem and unplugging one of the sensors improves it. yours should work in nearly the same way GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
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