2003 honda civic HX sputtering while driving

Check crank shaft sensor.

Check your ignition switch.

Time for the dealer to take a look. You need special skill and special tools to diagnose this not to mention years of experience with electronic engine control systems.

Drive the vehicle in "D". The D selection is the overdrive. You can consider the overdrive as a fourth gear. The D3 is simply third gear, and if driven in D3, the transmission will never shift into overdrive when needed.

Check fluid level when vehicle is cold.When it starts to overheat open the hood and make sure the radiator fan is blowing.If all this is OK then your thermostat may be bad.Look under the car when it overheats for leaks also.

depends on the model. Some come from honda, others come with the option to have it added later from honda or aftermarket. I have an LX accord and that was the case so I had it installed aftermarket but my HX civic had it stock from honda. (contact honda to see if that is an option for your model)

Your timming belt has jumped a tooth.Remove the covers and check that all teeth are ok.Then tighten or change the timming belt.I would fit a new timming belt.Has it is costly when they fail.Good luck.pippall.

Your battery is stone dead. Once started, the alternator keeps it running.

The cheapest thing to start with is to replace the oxygen sensor(s).

what are you doing at the time? just normal driving or stepping on it? email me with more info or questions at [email protected]