JavaScript test failing - checking for similar items, true if one item or less needs to be switched

Working on this code for a test, passing some but failing others.

Problem:

Two arrays are called similar if one can be obtained from another by swapping at most one pair of elements in one of the arrays.

Given two arrays a and b, check whether they are similar.

Example:

For a = [1, 2, 3] and b = [1, 2, 3], the output should be areSimilar(a, b) = true.

The arrays are equal, no need to swap any elements.

For a = [1, 2, 3] and b = [2, 1, 3], the output should be areSimilar(a, b) = true.

My Solution:

function areSimilar(a, b) {    
    var error = 0;
    for(var i = 0; i < a.length; i++){
       
        if(a[i] === b[i]){
            return true;
        } else if(a[i] !== b[i]){
            error++;
        }
    }
        if(error > 1){
            return false;
        } else{
            return true;
        }
}

Example of Test Passed:

Input:

a: [1, 2, 2] b: [2, 1, 1]

Output:

false

Expected Output:

false

Example of Test Failed:

Input:

a: [2, 3, 9] b: [10, 3, 2]

Output:

true

Expected Output:

false