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Message: <blockquote data-quote="Twista" data-source="post: 1194371" data-attributes="member: 8202">I did the key on engine off/on test and got code 118. Which is odd  because i do have warm start problems where black smoke comes out and  barely runs. So now im going to focus on this code i guess. Unless i got  a bad ECT sensor the one i have now is brand new. I read the  wiring could be toasted @ the connector and to cut it off and replace.Which is:Potential Symptoms  Symptoms of a P0118 could include:      Very poor fuel economy     A no start condition     Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring     Illumination of MIL  Causes  A code P0118 may mean that one or more of the following has happened:      A bad connection at the sensor     An open in the ground circuit between the ECT sensor and the PCM     A short in the voltage feed between the sensor and the PCM     A bad PCM (less likely)     A bad temperature sensor (shorted internally)</blockquote>