Can anyone give me an description of this error code???

Ron

 

P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS) (CIRCUIT)

Malfunction is detected when an excessively high or low voltage from the sensor is sent to ECM.

Description:
The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in terperature. The electrical resistance of the thermistor decreases as temperature increases.

 

Do your cooling fans operate while your engine is running? If so, your ECTS circuit is in fail-safe mode. You'll need to check the wiring for the sensor and probably replace the sensor to fix your problem. I would check the wiring and connectors first.

 

After i leave the car off for a while (ie. over nite), when i start it it has a very bumpy idle and stalls sometimes, also the exhaust gives off much more fumes than normal and the smell of the fumes are MUCH MUCH stronger. But then this only happens if the car has cooled down completely.

Possible that that is cause of my problem???

 

I know that defective coolant sensors on some GM vehicles cause the ECM to supply too much fuel and floods out the engine. I'm not sure if Nissan vehicles do this though. It seems possible though.