The 51-year-old sent the last text about two minutes before his Jaguar saloon ploughed into the vehicle which had hit the central reservation of the M1.
Driver Martyn Gombar, 28, had escaped, leaving his Audi A4 without lights and blocking two lanes, but died when he went back to get his mobile phone.
A Labour peer has denied sending a text message while driving immediately before a fatal motorway accident.
The red Audi had been marooned in the fast lane near Junction 35, near Rotherham, after smashing into the central reservation when Lord Ahmed's vehicle struck it.
The Audi driver, Slovakian Martyn Gombar, 28, from Leigh, Lancashire, died instantly in the second impact.
Police believe Mr Gombar had left the wreck but returned to his car to pick up his mobile phone.
Lord Ahmed suffered facial injuries and shock in the smash, which happened at around 6.20pm. His wife and mother, who were travelling with him, suffered bruising.
Reports said it was alleged he sent a text message to a journalist friend shortly before police received an emergency call.
The Crown Prosecution Service confirmed it was considering whether charges were appropriate in the case.
But Lord Ahmed said: "I totally deny this allegation and I have nothing else more to say. I was not using my phone at the time.
"I welcome the inquiry because it will vindicate me. I have co-operated with the police fully and there is an ongoing inquiry into this.
"As far as I'm concerned, I've got no comments to make because it's a police inquiry and they have every right to investigate."
Now this Is the same piece of shit
“Fitna” is of course the short but powerful film that looks at the reality behind the establishment’s espousal of Islam as a “religion of peace.” For daring to challenge current orthodoxy, Wilders is currently facing prison in Holland for his statements about Islam.
The screening of the film was due to take place this Thursday. And it was after the invitations were sent out that Lord Ahmed swung into action. He called a meeting with the government chief whip and the leader of the House, together with representatives of the Muslim Council of Britain and the British Muslim Forum.
At the meeting, Ahmed threatened to mobilise 10,000 Muslims to prevent Wilders from entering the House and said that he would take the organiser of the event to court.
Ahmed threatened to mobilise 10,000 Muslims