Emission Control Systems: Testing and Inspection

This database describes trouble diagnosis of Powertrain Control System parts whose trouble is not indicated by the on-board diagnostic system (self-diagnosis function). When diagnostic trouble code No. 12 is indicated by the on-board diagnostic system (self-diagnosis function) and assuredly those engine basic parts are all in good condition, check the above Electronic Fuel Injection system parts which may be a possible cause for each symptom of the engine.