Re: 175 Ficht Ram temperature meter malfunction
That's incorrect Vinnie. Regardless of whether or not the engine is running, the temp sensors temperature reading is normally within a few degrees of the ambient temperature.<br /><br />Code 41 is the temp sensor open circuit code. Either the sensor has failed (open), or there is a wiring harness issue between the sensor and the EMM, it could also be an EMM problem, but that doesn't seem to be the case as yet. The sensor should ohm out at 9000 to 11000 ohms at 77F degrees (25C).<br /><br />Code 42 is telling you the EMM senses the temperature is below the expected range, the low limit being 14F (-10C). In your case, this is most likely because of the sensor's open circuit. The EMM will allow the engine to run, but it will be in continuous warm-up mode, because it cannot read a temperature change. <br /><br />The EMM will supply extra fuel until the engine finally warms up. This could be part or all of your problem. Were you experiencing plug fouling problems before the sensor failure? If yes, them something else could be going on too. Have you noticed any smoking at start up or extremely fast idle rpm at start up?<br /><br />The 5 volt reference circuit voltage must be monitored with the diagnostic progam. Are you trying to monitor voltage with a volt meter? Or is your reading from the diagnostic program?<br /><br />-John