The South Africa international came back to David Moyes’ side on a six-month loan deal in January, having left the club to join Tottenham in January 2011 but struggled to break into Harry Redknapp's team.
"We've got to get Steven back. This is his home, and second time around, you can really feel that," Howard told the Liverpool Echo.
"[The players] have handcuffed him to the showers.
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"Hopefully the business side of things can get ironed out and he can be back."
Pienaar and Everton have been in impressive form since his return, losing just two games in 2012 and finishing seventh in the Premier League, four points above neighbours Liverpool.
The winger also chipped in with several crucial goals for the Toffees, including the opener in a 2-0 win over Chelsea and the leveller in a dramatic 4-4 draw with Manchester United, which helped swing the title race back in favour of Roberto Mancini’s victorious Manchester City.
And Howard is hopeful that, Pienaar aside, a couple more new recruits could help Everton reach the next level.
"We’re probably a couple of players away, but I’m sure every team will be saying that," he continued.
"Newcastle have done that. They have five or six guys in attack that can scare the life out of you.
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"We’ve shown that we’ve got it in us if we keep our foot on the gas for the whole season. I think we can do some really good things and everyone’s optimistic at this point."
And whilst Howard is keen to let the manager get on with his job in the transfer window, he added that he could give him a helping hand with his USA international colleagues.
"I’m going to be on the phone to Clint Dempsey and Landon Donovan and I’m going to try my best," he joked.