Electrical symptoms after pressure washing need the cleaning history included in the repair enquiry. Water may affect accessible connections or reach less obvious areas, but the event alone cannot identify a failed ECU.
Describe the immediate symptoms
Record whether the engine misfired, stalled, refused to start or developed several warnings. State which areas were cleaned and whether the problem appeared immediately or after parking. Keep any scan obtained before repeated starts or resets.
Do not unplug unfamiliar components, apply heat or spray chemicals around the engine to force a quick recovery. If the vehicle runs poorly or shows serious warnings, obtain advice about transport. A workshop should inspect the appropriate vehicle-side circuits and determine whether internal module assessment is justified. If the symptoms temporarily disappear as conditions change, still provide the full history; an intermittent improvement is not proof that the affected connection or component has been durably repaired.
Related help
- Engine Starts Then Stalls When Electrical Loads Are Switched On
- Engine Misfires Only When the Air Conditioning Is Switched On
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