13/10/2026
𝐕𝐨𝐥𝐯𝐨 𝐗𝐂𝟔𝟎 𝐓𝟓 𝐜𝐡𝐞𝐜𝐤 𝐞𝐧𝐠𝐢𝐧𝐞 𝐥𝐢𝐠𝐡𝐭, 𝐟𝐚𝐮𝐥𝐭 𝐜𝐨𝐝𝐞 𝐏𝟎𝟓𝟗𝟖𝟎𝟎.
Anyone familiar with these Volvo engine B4204T turbocharged 4 cylinders knows this fault.
It's related to the thermostat failure by internal coolant leaking into the heater circuit. However, if left unattended, this thermostat failure will escalate into ECU failure as the thermostat shorts out the ECU.
This is one such case. The thermostat failure has damaged the ECU and both components needed replacement.
Volvo XC60 T5 2.0 引擎故障灯亮,故障码 P059800。
熟悉 Volvo B4204T 2.0 四缸引擎的,都知道这个通病。它和节温器(Thermostat)故障有关:节温器内部冷却液渗漏到加热器电路。
但如果放着不管,这个节温器故障会造成成 ECU 损坏——因为节温器会短路ECU。
这就是其中一个真实案例:节温器故障已经损坏 ECM,最后节温器和 ECM 两个部件都需要更换。
所以,Volvo 出现 P059800,真的不要拖。早检查,可能只需换节温器;拖久了,就是节温器 + 电脑板一起换
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