P0135O2 Sensor Heater Circuit (Bank 1, Sensor 1)

There is a fault in the heater circuit of the upstream oxygen sensor on bank 1. Modern O2 sensors have a built-in heater so they reach operating temperature quickly; if the heater fails, the sensor takes too long to work and the computer cannot trust its readings early on. This is detected as abnormal heater current or resistance.

Ամենատարածված պատճառներն են՝ Failed O2 sensor heater element (sensor replacement needed), Blown fuse for the O2 heater circuit, Open or shorted heater wiring or connector, Corroded sensor connector, Loss of power or ground to the heater circuit, Engine control module/driver fault (rare)։

Սովորաբար անվտանգ է կարճ տարածությունների վրա վարել, սակայն շուտով ստուգել տվեք։

It is generally safe to drive short distances. Check the O2 heater fuse and wiring first; if those are good, the sensor itself usually needs replacing. Fixing it restores proper warm-up and emissions performance.