2002 Ford Focus Code P0302

  • 1 POST
  • 2002 FORD FOCUS

Engine Performance problem
2002 Ford Focus 4 cyl Two Wheel Drive Manual 129000 miles

P0302. Engine shuts down when #2 plug wire is removed. When the other wires are removed individually the engine runs rough. What could be the cause?

Do you
have the same problem?
Thursday, July 8th, 2010 AT 5:50 PM

1 Reply

  • 183 POSTS

A P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2.

SymptomsSymptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present
CausesA code P0302 may mean that one or more of the following has happened:

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer
Possible SolutionsIf there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.E. Spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.K.A. Coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Was this
Thursday, July 8th, 2010 AT 8:19 PM

Please login or register to post a reply.

Recommended Guides