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P0217 P0xxx · パワートレーン (P) 重大度高
Engine Overheat Condition
Coolant temperature exceeded the protective threshold. The ECU often cuts fuel or disables cylinders to protect the engine — take this seriously.
重大度の目安： 高 — 走行を止めてすぐに診断してください。さらに損傷が広がる恐れがあります
確認できる症状
- Temperature gauge in the red
- Steam from the bonnet
- Loss of power
- Coolant loss with no visible leak
主な原因
可能性の高い順に並んでいます。上から順に確認してください。
- 1 Low coolant
- 2 Failed thermostat stuck closed
- 3 Cooling fan not running
- 4 Water pump failure
- 5 Blocked radiator or head gasket failure
点検・修理の手順
費用が安く侵襲の小さい項目から — これらのコードの大半は部品の問題ではありません。
- ✓ Stop the engine and let it cool before opening anything.
- ✓ Check coolant level and look for external leaks.
- ✓ Verify the fan runs when commanded by the scan tool.
- ✓ Pressure-test the cooling system and test for combustion gas in the coolant (head gasket).
修理の選択肢
- Repair the leak and refill
- Replace the thermostat, pump or fan assembly
- Head gasket repair if combustion gas is present
P0217 — よくあるご質問
Can I top it up and keep going? +
Only to reach a workshop. Find why it overheated first — otherwise the next overheat is usually terminal.
Is a head gasket likely? +
If coolant disappears with no external leak and you smell sweet exhaust, yes. Do a block test before any major repair.