Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Nissan Sentra 2008 Base
2.0Litres Petrol
CVT Tranny
Symptoms
-Intermittent hard start
-Hesitation on acceleration
-Bad fuel economy
DTC
-P0011
Background
The last time I changed my engine oil and filter was 7 months ago (Feb, 2021), started to see this code on July, 2021 with above symptoms
My bad on servicing
The oil was in really bad state to be honest, darkend and thick.
Now
-Changed engine oil and filter
-Checked wiring integrity (All wiring good as per my diagnosis) Unplugging it brings up P0075, plugging it and taken for drive brings up P0011
-Not sure timing chain has jump a tooth or more because my engine sound and stability is like the same since I got the car.
Still having the trouble code irrespective of changing the engine oil and filter.
By the way the trouble code doesnt appear instantly after cleared and taken for drive, but after driving for sometime it comes back on.
Have noticed that after changing the oil, it takes a little while before it comes back on.
Any direction I should look now in troubleshooting this problem?
-Update
Today I unplugged the harness to the sensor and car drove good and regained its power, no hesitation on acceleration and less engine noise.
Can you drive like that without causing future problems?