Well I am having a weird problem with my car. This started about a year ago my car would start fine but sometimes stall if i was waiting at a stop sign or at the light. I would turn the car back on and it would crank but would not catch and i would have to pump the gas a few times very fast for it to start. THis only happened about every 4 or 5 months. The ECU would throw the following codes

0103 - engine coolant temp. sensor
0304 - knock sensor circuit
0908 - engine coolant temp. sensor function

Just recently this problem of stalling has been happening a few times everyday and only when my car is standing still. I not sure which to change first the ECTS or the knock sensor. I was wondering if the ECTS affects the knock sensor in any way. I was informed by a friend that the MAFS might be the problem but I dont get any codes for this. Thank you

- surge

 

the knocks sensor wont cause yoru car to stall, the faulty ECTS on the other hand will cause your car to stall

 

0103
OBD-2 Diagnostic Trouble Codes are always four digits. Your DTC "13" is actually "0103", and it points to the Engine Coolant Temperature Sensor. The factory service manual says this DTC is set when the ECTS signal has an excessively high or low voltage. It suggests testing the ECTS and also the associated electric connector and wiring harness.

On the 4th Generation Maxima engine the Engine Coolant Temperature Sensor is located in the water outlet tube close to the engine end of the upper radiator hose. There are two sensors in that area. The one nearest the hose is for the dashboard temperature gauge. The ECTS, the one you're interested in, is right next to the the gauge sending unit. There is a good picture of these sensors in the Haynes manual on page 3-7.

With the engine cold, disconnect the ECTS and measure its resistance. Reconnect the ECTS, start the engine, run it until fully warmed up. Stop the engine, and repeat the resistance measurement. The "warm" reading should be a much lower value than the "cold" reading.

The specs for the ECTS are:
Engine coolant temperature 68F, ECTS resistance 2.1 - 2.9 Kohms
Engine coolant temperature 194F, ECTS resistance 0.24 - 0.26 Kohms
(Roughly a factor of ten difference.)

 

going to change the sensor and then see what happens. thank you for the help.