Does the following passage contain a comma splice error?

Looking up, he couldn’t even see the top of the mountain, it was totally covered by clouds.

Yes, the following passage contains a comma splice error.

Yes, the following passage contains a comma splice error. A comma splice occurs when two independent clauses are joined together by a comma without proper conjunction or punctuation. In this case, the independent clauses are "Looking up, he couldn't even see the top of the mountain" and "it was totally covered by clouds." To correct the comma splice, you can either replace the comma with a semicolon or add a coordinating conjunction after the comma.