I rather suspect a clutch failure on a 2011 City (same torque converter as that generation of Civic / Fit etc). Gear shifting takes place and there are no errors but I can't accelerate over 40-50 kilometers an hour without significant effort, and mileage is about half of what it should be.
Before coming to this, I did all these -
1. Replaced the PCV valve (and cleaned its breather hose)
2. Replaced the evap canister valve in the gas tank
3. Cleaned the throttle body, MAF sensor (etc) which had accumulated gunk over the years
There is a slight lag in gear changing, as if the one way torque converter isn't slipping, but doesn't release too well, so that acceleration is retarded and mileage drops about 50%
Is there anything that will turn up in an OBD scan to confirm this diagnosis without opening up the transmission? How feasible is it to service these with new clutch rings (and/or whatever is the equivalent of a clutch release bearing in a torque converter) rather than sell the car and get another slightly newer (5-7 year old) beater for strictly local use in a city with congested traffic?
Before coming to this, I did all these -
1. Replaced the PCV valve (and cleaned its breather hose)
2. Replaced the evap canister valve in the gas tank
3. Cleaned the throttle body, MAF sensor (etc) which had accumulated gunk over the years
There is a slight lag in gear changing, as if the one way torque converter isn't slipping, but doesn't release too well, so that acceleration is retarded and mileage drops about 50%
Is there anything that will turn up in an OBD scan to confirm this diagnosis without opening up the transmission? How feasible is it to service these with new clutch rings (and/or whatever is the equivalent of a clutch release bearing in a torque converter) rather than sell the car and get another slightly newer (5-7 year old) beater for strictly local use in a city with congested traffic?