(A1) - Diagnostic Trouble Codes (DTC)

A key difference between EEC-IV, OBD I and EEC-V, OBD II is the monitors. EEC-IV monitors are designed to identify system and component issues. EEC-V monitors are designed to measure the ability of systems and components to maintain low emission levels.

To minimize the replacement of good components, be advised that the following non-EEC areas may be the issue:

^ Excessive blow-by
^ PCV malfunction
^ Vacuum leaks
^ Fuel pressure
^ Throttle sticking or linkage binding.