Ford Focus - P2303 fault code? - ben100
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?
Ford Focus - P2303 fault code? - elekie&a/c doctor
This fault relates to an ignition issue. I would be looking at possible problems with the ht leads , spark plugs and coil . I would also check the wiring connector at the coil . Common problem to become loose .
Ford Focus - P2303 fault code? - SmithyBilly

So, it looks like your Ford Focus 2006 1.6 is acting up with the EML light coming on and a P2303 fault code popping up. And in first gear, if you try to take off too fast, it's juddering or kangarooing, but it's fine with slower acceleration. Sounds like there might be an issue with the ignition coil or ignition system.

Just a friendly reminder that it's important to get this sorted out ASAP to avoid further damage to your ride. Ignition problems can mess with your engine's performance and efficiency, so it's best to have a qualified mechanic or Ford dealership take a look and do the necessary repairs.

In the meantime, you can try being gentle with the gas pedal in first gear to minimize the juddering or kangarooing, but remember that it's just a temporary fix. Getting a professional diagnosis and proper repairs is the way to go for a safe and smooth driving experience.

Ford Focus - P2303 fault code? - Ana William

The P2303 code on your Ford Focus 2006 1.6 is related to the ignition coil circuit. This code indicates that there is an issue with the primary or secondary circuit of the ignition coil in cylinder 1. This could be caused by a faulty ignition coil, damaged wiring, or a problem with the powertrain control module (PCM).

As for the juddering/kangarooing issue in first gear, this could also be related to the faulty ignition coil or it could be caused by a separate issue, such as a clogged fuel filter, a malfunctioning fuel injector, or a problem with the transmission.

It's best to have a mechanic or technician take a closer look at your vehicle to diagnose and properly fix the issue. They can perform a thorough inspection of the ignition coil, wiring, and other components to determine the root cause of the problem.

Ford Focus - P2303 fault code? - Railroad.

The ignition coil is actually two coils in one pack. One fires cylinders 1 & 4, and the other fires cylinders 2 & 3. On the ignition coil pack you have a plug with three wires. The centre wire is a common 12v ignition supply to both coils. The outer two are the returns to the ECM. One is for one coil and the other is for the other coil. You need to check that both are switching when the engine is cranking. It's likely that one is and the other one isn't. That would likely mean you either have a broken wire between the coil and the ECM, or an internal fault with the ECM.

Ford Focus - P2303 fault code? - Big John

Coil pack failure is quite common, fortunately it's a fairly cheap fix. Do asap to stop further damage - whilst misfiring unburnt fuel is being sent down the exhaust and can damage sensors & the catalyst all of which cost considerably more.