po141 Mercedes Benz

Question

Would changing the sensor fix all problems that indicates codes po170, po136 and po141? My car is roughly 13yrs old has not long crossed the 90k mark and like to keep it running bit longer, I also have the srs light on it has been regassed as canister was empty any reason y the light would still be on?

Answer 1

P0170 Fuel trim lean Bank 1

P0136 02 sensor circuit malfunction Bank 1 Sensor 2

P0141 02 sensor heater circuit malfunction Bank 1 Sensor 2

When a 02 sensor ages it degrades due to mileage and use, so at so many miles and use you can expect this component to wear out. Replacing the rear  02 sensor will not fix P0170, P0170 is a lean condition this is where you have more air than fuel, Vacuum leaks are the main cause for a lean condition, so vacuum leaks has to be look for.