I think everyone knows how good City can be in title run-ins, we have seen it happen time and time again and Jurgen Klopp knows firsthand what it is like, because City have pipped him to the title on a number of occasions, but this season looks somewhat different; City are not playing in that menacing way we have come to know them for. City's last two games against Brentford and Bournemouth respectively were tougher than anybody thought they were going to be, whilst the other title contenders (Liverpool and Arsenal), have been flying of late and scoring goals for fun, Pep knows they must improve, if not either Liverpool or Arsenal will take the title from them.
Sometimes it's not so important to score a lot of goals, the most important thing is to maintain the winning momentum, 3 points in every match is much more important than winning several matches with a score of 5-0, and then losing one match with a score of 0-1 (I'm talking about Arsenal now ). Don't worry about City not scoring many goals, this is just a temporary phenomenon, I'm sure they will have matches in which they will score significantly more. Guardiola understands that the end of the season will be very difficult, and he needs to distribute team forces in such a way that his team can equally play in several tournaments, I think this is what Guardiola is most worried about.