Questions and Answers

Ford Windstar Has Lean Banks Q. Hello: My Check engine light recently illuminated. The OBD-II scan tool gives "Lean Bank 1" and "Lean Bank 2" codes. What troubleshooting sequence do you suggest? Fuel filter? Injectors? Fuel pressure regulator? 1999 Ford Windstar 3.8 liter Automatic transmission 70,000 miles Fuel Injection Thanks in advance! Chris

A. Basically the problem is the engine is running too lean. The most common cause of this is a vacuum leak. So, that would be the first thing to check for. I would also recommend replacing the fuel filter.

If the codes persist, then I would do a fuel pressure test and see what that tells me.