Plymouth secured their Football League status for next season with a point against promotion-chasing Oxford.
Left-back Robbie Williams gave Argyle a dream start when he netted a 20-yard free-kick in the second minute.
Luke Young could have made it 2-0 but keeper Wayne Brown made an impressive save to keep out his half-volley.
Asa Hall levelled with a stunning 30-yard strike and fellow midfielder Adam Chapman hit the post with a free-kick but Oxford failed to find a winner.
Oxford drop out of the play-off places for the first time since January and sit two points behind seventh-placed Crewe.
VIEWS FROM THE DRESSING ROOM
Plymouth Argyle manager Carl Fletcher told BBC Radio Devon:
"The last couple of years the club has been relegated, had money issues, it was important that we did what we had to do and full credit has to go to the players.
"I'm proud to be called manager of such a great football club, I'm honoured to be part of the whole community really, and I think the players show it as well.
"A mention has to go to James Brent, who put me in charge, and stuck by his decision.
"We know Oxford are a good side, we could've had a couple more so the draw is disappointing, but thankfully the other results went our way."
Plymouth Argyle 23 Cole 02 Berry 05 Purse 14 Bhasera 22 Blanchard 03 Williams 15 Young 19 Wotton Booked 20 Hourihane 10 Fletcher (Chadwick - 87' ) 11 Feeney Booked (MacDonald - 60' ) Substitutes 01 Larrieu 13 Soukouna 29 Chadwick 31 Hemmings 32 MacDonald Oxford United 21 Brown 05 Duberry 06 Wright 16 Whing 07 Chapman 14 Hall 20 Leven 26 Davis 18 Morgan Booked 23 Rendell (Constable - 62' ) 27 Montano (Johnson - 67' ) Substitutes 34 Crocombe 17 Capaldi 08 Heslop 09 Constable (Heslop - 75' ) 19 Johnson