Antonio Felix da Costa is still struggling to come to terms with the problem that cost him a place on the podium at last month's Putrajaya ePrix.
After qualifying in fourth, the Team Aguri driver from Portugal was in second place behind eventual race winner Lucas di Grassi before a software problem caused his car to fail.
He eventually got going again, but had to settle for sixth place.
“Malaysia was a big surprise for all of us,” Felix da Costa told Motorsport.com.
“We were coming into the race as underdogs, and it would have been awesome to have a podium finish against these teams that have spent a lot more money and have had a lot more testing than us.
“I did a good lap to start P4 on the grid, and a podium was in our sights until we had the software issue. It was very hard to digest, to be honest.”
Felix da Costa also admitted that the first two rounds of the new season had highlighted some weaknesses of the season package in comparison to the frontrunners.
“It’s clear for us that we have a disadvantage to the teams who have done a good job with their powertrains – not only on power, but mainly on efficiency,” he said.
“We knew this coming in, so we are just trying to improve what we have and see where it takes us.
“Having looked at Putrajaya race, we need tracks with a low amount of shifting per lap, and not so many big straights. With that, we can be closer to the most competitive teams.”