I have 96 saturn sedan 1.9L and I An MIL code PO 711, does any body know wherer I began to try to locate the problem.

 

The transaxle fluid temperature sensor, engine coolant temperature (ECT) sensor, and the intake air temperature (IAT) sensor are thermistor circuits. When the sensors are cold, they have high resistance and high sensor voltage. As the temperature increases, this resistance and voltage decreases. The PCM supplies a 5-volt signal to the sensors, which is also connected to ground. The PCM reads the voltage drop on the sensor signal lines to determine the corresponding temperature.<A name=ss2-1218567></A>
<H5>Conditions for Setting the DTC</H5>



<H4>Important</H4>


The transaxle fluid temperature ECT and IAT sensors are continuously checked when the ignition is ON.






<H4>Important</H4>


Visually inspect the transaxle fluid temperature, ECT, and IAT wires for evidence of shorts to battery/ignition voltage. Shorts to battery/ignition voltage will skew the sensor resistance and cause DTCP0710 and P0711 to set.





DTC P0711 is set when the PCM/TC has completed 2warm-up cycles with the following parameters detected:
<UL ="BULLET">
<LI>Engine coolant below 30°C (80°F) after exceeding 71°C (160°F).
<LI>IAT and ECT are within 6°C (10°F).
<LI>The transaxle fluid temperature reading is greater than 9°C (16°F) of the IAT during start-up. </LI>[/list]<H5>Diagnostic Aids</H5>


DTC P0711 may set if the vehicle is towed with the front wheels on the ground. If it is suspected that the vehicle has been towed recently, clear the DTC and return the vehicle to the customer.


With the ignition ON and the engine OFF, observe the transaxle fluid temperaturevs.ECTvs.IAT sensor after the vehicle obtained a cold soak.


Refer to Description and Operation for transaxle fluid temperature, ECT, and IAT sensors Temperaturevs.Resistance chart.



<H4>Important</H4>


The PCM uses 2internal circuits to identify transaxle temperature. One circuit is used for temperatures of 48°C (118°F) and below. If either circuit has failed, the DTC will set. However, the temperature may look normal in the other range.






<H4>Important</H4>


DTC P0711 can not be cleared until the TFT sensor passes at least 1warm-up cycle. Refer to DTCP0711 parameters for specific requirements.





Test low scale with the engine at room temperature and high scale with the engine at normal operating temperature, above 70°C (158°F).Edited by: Low Saturn