Peterborough MP Fiona Onasanya appeared at the Old Bailey on Monday charged with one count of doing an act tending or intending to pervert the course of justice (PCJ).
The 34-year-old, who won the marginal seat with a majority of just 607 votes in 2017, spoke only to confirm her identity and plead not guilty during the brief hearing.
She and her 33-year-old brother Festus Onasanya are alleged to have misinformed Cambridge police about who was responsible for driving a speeding vehicle on July 24 2017.
They claimed a man called Aleks Antipow was behind the wheel.
It is alleged that by naming him they enabled themselves to avoid prosecution.
Onasanya's brother, from Chesterton, Cambridge, faces two further charges of PCJ.
He is alleged to have blamed someone else for two separate speeding incidents on June 17 and August 23 last year.
Ms Onasanya, who was a solicitor before her election to Parliament, is a Labour whip, meaning she is responsible for party discipline.
The siblings are due to next appear at the Old Bailey on October 26 for a pre-trial hearing.
A provisional trial date has been set for November 12.
Speaking to Premier shortly after her election victory she explained her role as a Christian in parliament.
She said: "Scripture says to go into all the world – the world isn't just a geographic world – its spheres of influence.
"So I'm going into the world of politics."
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