(Recasts throughout, updates prices, adds comments; changes byline, dateline, pvs LONDON)
* BoE's Carney says central bank likely to need to raise rates
* Traders see more hawkish shift in European monetary policy
* ECB chief did not intend to signal imminent policy tightening -sources
* Delayed U.S. healthcare vote hurts dollar
* Graphic: World FX rates in 2017 http://tmsnrt.rs/2egbfVh
NEW YORK, June 28 (Reuters) - The U.S. dollar touched its lowest level against the euro in a year on Wednesday after hawkish comments from the head of the Bank of England fueled bets on tighter monetary policy in Europe, while Tuesday's delay to a U.S. healthcare vote also hurt the greenback.
The euro extended the prior session's rally against the dollar, which had sent it to its strongest one-day percentage gain against the greenback in more than a year, while sterling also jumped after BoE Governor Mark Carney said the central bank is likely to need to raise interest rates as the British economy comes closer to operating at full capacity.
Speaking at a European Central Bank conference in Portugal, Carney said the BoE will debate this "in the coming months."
Carney's remarks convinced traders that European monetary policy was shifting in a more hawkish direction, analysts said, just a day after European Central Bank President Mario Draghi opened the door to tweaks in the bank's stimulus policy, fueling market expectations that the ECB will announce a reduction of stimulus as soon as September.
Analysts said Draghi's comments continued to support the euro even as sources familiar with the ECB chief's thinking said Wednesday that he intended to signal tolerance for a period of weaker inflation, not an imminent policy tightening.
There is a bit of a concern in the markets about the fact that the balance of monetary policy expectations is moving a little bit in a more hawkish direction in Europe," said Alvise Marino, FX strategist at Credit Suisse in New York.
The euro rose as much as 0.5 percent against the dollar to a one-year high of $1.1390 after jumping 1.4 percent Tuesday. The dollar index, which measures the greenback against a basket of six major rivals, fell as much as 0.4 percent to hit a more than seven-month low of 95.967.
The dollar was last down 0.2 percent against the yen at 112.12 yen after hitting a more than one-month high of 112.46 on Tuesday.
The announcement on Tuesday that U.S. Senate Republican leaders postponed a vote on a healthcare overhaul continued to fuel skepticism that U.S. President Donald Trump's administration would realize pro-growth infrastructure spending and tax reform policies, hurting the dollar.
Prospects for infrastructure spending and tax reform are fading by the minute, said Karl Schamotta, director of global product and market strategy at Cambridge Global Payments in Toronto.
(Reporting by Sam Forgione; additional reporting by Patrick Graham in London; Editing by Chizu Nomiyama)