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Anyone familiar with P1521 code?
Anyone ever heard of a P1521 code. It’s for incorrect oil used. I had to order 0W40 Penzoil Ultra from Amazon. I couldn’t find it anywhere. I could find 0W40 for European vehicles but it doesn’t meet the requirements given for the 6.4. Even though I used the correct oil, it still showed a P1521...- copper93
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- Forum: 6.4 Hemi V8