Question

He asked me, 'What is my fault?' (rewrite in reported speech)

Answer 1

He asked him what his fault was

Answer 2

$\huge{\bold{hey\: there!!}}$
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Answer:-

He asked me what his fault was.

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He asked me, 'What is my fault?'

=>In the given question , the reporting verb is in past tense and the verb of repoerted speech is in Present Indefinite
so , the verb of reported speech will change acc. to the following rule:-⤵️

◼️[Present Indefinite tense => Past Indefinte]◼️

And hence the answer goes,

He asked me what his fault was.

✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️

$\huge{\bold{\mathfrak{Thanks }}}$

Hope it helps u.