* It's a typo: Perhaps you meant something else, like "low wash" (referring to a low-pressure wash), "low-flow wash," or a specific part name with a similar-sounding abbreviation.
* It's a regional term or slang: Some mechanics or regions might use non-standard terms.
* It's a specific repair shop's terminology: A particular garage might use "lo wash" internally for a procedure.
To get a helpful answer, please provide more context. What were you trying to do or find when you encountered this term? Knowing the specific problem or task will help determine what you really need.
