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The 1.0 EcoBoost three-cylinder engine is prone to head gasket failure causing coolant loss into the combustion chamber. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.
Based on 0 driver confirmations
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Ford problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
Coolant disappearing slowly. Everyone said head gasket but mechanic found the plastic degas bottle (coolant reservoir) had a hairline crack. £45 for a new bottle. Check this before assuming the worst — these bottles crack on early EcoBoost engines.
Parts replaced: Coolant degas bottle
Coolant loss with no visible leak. Ford acknowledged this is a known issue on the 1.0 EcoBoost and offered an extended warranty on the cooling system components. Covered at no cost at 58k miles. Ask Ford directly — they have a customer satisfaction programme for this.
Parts replaced: Head gasket, coolant
Coolant level dropped gradually over 3 weeks. No overheating, no white smoke initially. Then one morning white smoke appeared. Head gasket confirmed. Ford had a known fix for this — updated head gasket and revised cooling system. £800 at a Ford dealer. At least they knew exactly what to do.
Parts replaced: Head gasket (revised), head bolts, coolant
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