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1990 Cadillac SeVille - Page 9 Questions & Answers
Have 2002 Cad. Sev.that battery was disconnected pos. first, now the tach quite, turn sig. and speedo. quite has obi 2 readings of P0507 P0650 and P0741 can you help PLEASE?
I don't know those codes, you can google them and find them, or try googling "OBD-II codes" (OnBoard Diagnostics) to find the codes and meaning.
What I jumped in to say, was it wouldn't matter if you removed the positive or the negative cable first, AS LONG AS THE IGNITION KEY WAS IN OFF. So if key wasn't in ON, you can take off either cable first. People only take off the negative first as a safety precaution: if you take off positive first, there is a chance you could cause sparking with your wrench touching any metal on the car, or if the positive cable terminal touched metal before you take off the negative. Always, just for safety, take off the negative first. Also never take off the battery when the key is in ON.
0507- Idle control system too high.
0650-Malfunction indicator lamp (MIL) control circuit malfunction
0741-Torque Converter Clutch circuit performance or Stuck Off
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