Ошибка P0132: высокий сигнал датчика кислорода (лямбда-зонд, банк 1, датчик 1)

The oxygen sensor before the catalytic converter on bank 1 (sensor 1) is the main control sensor for the mixture. It is either a switching sensor (about 0.1 V lean to 0.9 V rich) or a wide-band sensor that works with a pump current evaluated by an interface chip. On switching sensors the signal is above what the sensor can physically produce (about 1 V): Ford above 1.1 V for 10 s, GM above 1050 mV, Saab Trionic above 1.5 V for 5 s. The cause is almost always electrical – the heater supply or battery voltage on the signal wire, or a heater-to-signal short inside the sensor; some GM modules also read an open wire this way. On wide-band sensors the interface chip reports a sensor wire shorted to voltage. If P0132 and P0138 appear together, a shared short in the harness is likely. A stored code usually switches mixture control to open loop and suspends adaptation and converter monitoring.