Install (and use) Text::CSV_XS and its utilities:

$ csv-check test.csv
# CSV_XS ERROR: 2027 - EIQ - Quoted field not terminated @ rec 1 pos 3
+6
Checked test.csv  with csv-check 1.5 using Text::CSV_XS 1.01
test.csv line 3/36 - 2027 - EIQ - Quoted field not terminated
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Depending on how well/bad the CSV is formatted, some extra junk may surface