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B0159 B0xxx · 车身（B） 低严重度
Outside Air Temperature Sensor Circuit
The ambient temperature sensor is open, shorted or reading implausibly. Automatic climate control and some driver displays depend on it.
严重程度说明： 低——通常不影响行驶，下次保养时处理即可
你会注意到的故障现象
- Outside temperature display wrong or blank
- Climate control behaves oddly
- Ice warning unreliable
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Failed sensor (usually in the mirror or front bumper)
- 2 Corroded connector
- 3 Rodent damage to the wiring
- 4 Sensor exposed to heat soak
如何排查
先做花钱最少、侵入最小的检查——大多数这类码不是零件问题。
- ✓ Compare the displayed value with reality on a cold start.
- ✓ Locate the sensor (mirror housing, grille or bumper) and inspect the wiring.
- ✓ Measure resistance and compare with the temperature table.
维修方案
- Replace the ambient temperature sensor
- Repair the wiring
B0159 —— 常见问题
The reading is high in traffic — is it broken? +
Heat soak near the radiator is normal. If it stays wrong at speed after a cold soak, the sensor is faulty.
Does it affect engine management? +
Rarely on petrol; some diesel and hybrid strategies use it for aftertreatment or battery thermal logic.