2010 Nissan Altima 155 000 kms
I have an engine light which was on for a few days and then turned off. I scanned it afterwards and got P0420, P0725 (past) and P0826 (past). Also I found the short term fuel trim bounces from -4 to -10 on idle and the short term fuel trim bank 1 sensor 2 is 99.2%
What does this mean for the transmission because the car does jerk
I don't know if this affect this but in the summer I get 9 litres per 100kms and in the winter it's around 13 litres per 100kms in Ontario.
The P0725 code can cause issues with shifting. Check out this link:
https://www.obd-codes.com/p0725.
For the fuel consumption, replace the engine air filter, and clean the MAF sensor and throttle body.
I would not worry about the P0420 for now if it has not come back yet.
