P0197 EOT sensor/circuit

2010 NISSAN MAXIMA
90,000 MILES • 3.5L • V6 • FWD • AUTOMATIC
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EDDY1991
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hi
in my max 2010 check engine appear
code is P0197 engine oil temperature sensor circuit

I found the sensor on lower right near oil filter.

I cleaned the harness but nothing now

please need help ASAP
Jan 3, 2016 at 7:31 PM
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ASEMASTER6371
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did you replace the sensor??? the issue is usually the sensor itself

Roy
Jan 3, 2016 at 11:26 PM
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EDDY1991
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i replaced the sensor
the EOT sensor i got from the dealer is the one installed on the upper thermostat
that is also coolant sensor ??
Jan 4, 2016 at 3:14 AM
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EDDY1991
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still check engine on with same code...
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Jan 4, 2016 at 3:17 AM
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ASEMASTER6371
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no the eot sensor is at the bottom by the filter.

the one at the thermostat is the ect or engine coolant sensor.

Roy
Jan 4, 2016 at 4:01 AM
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EDDY1991
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everyone here told me that is a pressure switch. same which is near the crank pulley.
Jan 4, 2016 at 4:05 AM
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ASEMASTER6371
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it is a sensor which does both jobs

Roy
Jan 4, 2016 at 4:11 AM
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EDDY1991
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thanks sir
I appreciate
i will update u ASAP
Jan 4, 2016 at 4:28 AM
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EDDY1991
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sir
the pressure switch is working
oil level light is fine.

still that is bad for Engine oil temperature??
Jan 5, 2016 at 1:08 AM
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EDDY1991
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sir
I changed the switch but again same problem p0197
2- on neutral idle position the RPM is not still. car is trying to stall

today i cleaned both catalytic converters and the hesitation on idle is still there



Jan 10, 2016 at 4:16 PM
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ASEMASTER6371
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try cleaning the throttle body out real good for the idle.

do you have a real scan tool, not a code reader??

Roy
Jan 10, 2016 at 8:26 PM
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EDDY1991
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no i dont have
Jan 10, 2016 at 9:47 PM
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ASEMASTER6371
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ok, hard to continue without it as info is needed to help find the failure. inspect the wiring closely for breaks and bad connections.

Roy
Jan 10, 2016 at 9:51 PM
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EDDY1991
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ok i will inspect and let u know
thanks
Jan 10, 2016 at 9:53 PM
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EDDY1991
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sir
i scanned the car from a workshop with a scanner and this time its just a single code p0021 timing control b2

the smoke become low and it is only when i rev high and release.

water vapors appear on the muffler tip

totally confused ????????
Jan 11, 2016 at 5:33 PM
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ASEMASTER6371
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water vapors are normal on the tail pipe. the variable timing code is usually caused by sludge in the oil. suggest flushing out the oil system with a product called sea foam, change the oil, filter and the solenoid for the code.

Roy
Jan 12, 2016 at 12:16 AM
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EDDY1991
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i changed the solenoid already.
but fed up with miss fire on idle.
no codes detected
Jan 12, 2016 at 12:18 AM
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ASEMASTER6371
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if you did not flush the system with the sea foam, you will sludge up the new one and it will fail.
Jan 12, 2016 at 12:25 AM
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EDDY1991
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ok i will do
thanks
Jan 12, 2016 at 12:26 AM
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