Narrative:

Level at 10;000 ft; we were given a heading to intercept the localizer to 35L and then descend to 7500 ft; cleared ILS approach. As we approached the localizer course; the autopilot did not capture the VOR/localizer. ATC queried whether we were on course and I began hand flying back to the right to intercept and overcorrected; as ATC then told us to 'turn immediately' to the left. I then realized I had the localizer frequency for 35R tuned in; as that is what we had originally planned and briefed to fly. By the time I had the correct frequency tuned; we were still at 10;000 ft and descended to capture the glideslope. When we were approaching dymon; we were approximately 1000 ft high; at 8000 ft versus 7000 ft so I elected to go round. Tower instructed us to track outbound on the localizer and climb to 9000 ft.when handed back to approach; they began vectoring us back to 35R for another approach and landing. I initially began a left turn as the flight director was still in approach mode commanding a left turn. ATC queried whether we were in a right turn as instructed. The first officer deselected approach mode and engaged heading select. The flt director then commanded a turn to the right as selected on the MCP. On downwind; approach changed the runway to 35L again and we made an uneventful ILS approach and landing.when unexpected runway changes occur; I should accomplish an entire new approach briefing; rather than an abbreviated version of the initial briefing to ensure the proper frequency; course; and minimums are set.

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Original NASA ASRS Text

Title: B737-800 flight crew reported a track deviation on arrival into DEN stemming from a late runway change.

Narrative: Level at 10;000 ft; we were given a heading to intercept the LOC to 35L and then descend to 7500 ft; cleared ILS approach. As we approached the Localizer course; the autopilot did not capture the VOR/LOC. ATC queried whether we were on course and I began hand flying back to the right to intercept and overcorrected; as ATC then told us to 'turn immediately' to the left. I then realized I had the LOC frequency for 35R tuned in; as that is what we had originally planned and briefed to fly. By the time I had the correct frequency tuned; we were still at 10;000 ft and descended to capture the glideslope. When we were approaching DYMON; we were approximately 1000 ft high; at 8000 ft versus 7000 ft so I elected to go round. Tower instructed us to track outbound on the LOC and climb to 9000 ft.When handed back to Approach; they began vectoring us back to 35R for another approach and landing. I initially began a left turn as the flight director was still in Approach mode commanding a left turn. ATC queried whether we were in a right turn as instructed. The First Officer deselected Approach mode and engaged Heading Select. The Flt Director then commanded a turn to the right as selected on the MCP. On downwind; Approach changed the runway to 35L again and we made an uneventful ILS approach and landing.When unexpected runway changes occur; I should accomplish an entire new approach briefing; rather than an abbreviated version of the initial briefing to ensure the proper frequency; course; and minimums are set.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.