What's causing my Peugeot 206 to misfire?

My 2003 Peugeot 206 1.4 diesel has developed a misfire. I took it to my local garage, but they have not been able to find any fault as the diagnostics machine was unable to establish a connection. Do you know what could be causing the misfire?

Asked on 22 November 2016 by Claire

Answered by Honest John
2nd report today. Three problem areas with this engine are injectors, injector seals and the Electronic Accelerator Module.
Similar questions
I have a new Nissan Qashqai 1.6 dci manual. I bought it four months ago and it has 2000 miles on the click. However, last week, it developed a "misfire" usually in fifth gear. This currently happens infrequently...
I have a Peugeot 206, which misfires when the breaks are applied. The car then has to be shut down and restarted for it to stop. The ECU, throttle body and throttle switch have all been replaced, but the...
I have a 2012 Kia Cee’d 1.6 diesel which seems to "misfire" when accelerating between 1500 and 2000rpm. I use it as a driving school car and having it stutter when entering fast moving roundabouts is definitely...
Related models
Not bad looking. Economical 1.4 diesel gets under 119g/km.

Value my car