Ford focus 2006 1.6 the EML light came on, plugged it in & got a P2303 fault code. Also in first gear only if you try to take off quick it starts to judder/kangaroo but will take off fine if you take off normally/slower if that relates to the issue at all?
Looks to be a coil pack or possibly leads issue which is fairly common to that engine (I’m not at all an expert just Googled out of interest) so replacing the applicable parts should cure both the EML and the jerky acceleration.