- England's pack won the battle up front, with prop Mako Vunipola named man-of-the-match.
England launched their November international campaign with an unconvincing 21-8 victory over 2019 World Cup pool opponents Argentina at Twickenham on Saturday.
Nathan Hughes scored his first Test try and Semesa Rokoduguni also crossed for England before Nicolas Sanchez went over late on for the Pumas in an error-strewn match.
England's pack won the battle up front, with prop Mako Vunipola named man-of-the-match.
"There's stuff to work on," England captain Dylan Hartley told Sky Sports.
"Ball in hand, I think we need to get into the right areas of the field and then treasure the ball," the hooker added.
"Too many times it ended up in touch."
Meanwhile former soldier Rokoduguni said scoring a try on Armistice Day, which commemorates war dead, was particularly poignant.
"Today is one of the biggest days for service personnel and it was an honour to represent both the army and England, the Bath wing told the BBC.
This was England's fourth successive victory against Argentina in just over a year, including a 2-0 series triumph in Argentina in June.
England will surely need to go up a gear if they are to beat Australia at Twickenham a week on Saturday.
For the Pumas, defeat continued a miserable 2017 that has seen them record just one victory in 10 Tests — against Georgia in June.
England started with Henry Slade at inside centre and Sam Underhill in the pack as coach Eddie Jones rested the British and Irish Lions duo of Owen Farrell and Maro Itoje.
In an unfamiliar black change kit at a rainy Twickenham, the hosts had a chance to take the lead as early as the second minute.
But fly-half Ford, taking over kicking duties in Farrell's absence, saw a 35-metre penalty attempt hit the right post.
He was twice on target from closer range, however, after Argentina conceded two needless ruck penalties.
Ford's successful goal kicks came either side of wing Emiliano Boffelli's eighth-minute effort for the Pumas.
A key moment of the first half came in the 22nd minute when Argentina wing Joaquin Tuculet was sin-binned for taking out England fullback Mike Brown in mid-air as the pair contested a high ball.