The Blues went down 4-1 at Kidderminster Harriers on Saturday - their third consecutive defeat.
It's been a similar story all season for the Chesire-based side whose away struggles came to the fore once again.
Johnson says he is well aware it's something that is holding them back.
"We've had a fantastic season at home," he told the National League's Oli Osborn.
"But if you want to finish in the play-offs, you have to have a half decent away record and our's isn't good enough."
Defeat on Saturday menat the Blues have just one win in their last nine league outings.
And while Johnson admits their form isn't good enough, he still believe it's all to play for.
"It's out third defeat on the bounce and we seem to be going through the motions as a team," he said.
"Everything went wrong today but it's all to play for.
"We're playing teams around us in the next few games so it's still in our hands."