Nissan: MIL On With Code P0603 Stored For ECM Back Up Circuit
Step 1: Confirm that the battery voltage is 11 volts or more, with the ignition on and engine off.
Audi Fuel System: MIL On/Multiple Low Fuel Pressure DTCs
Due to fuel intrusion into the low-pressure system fuel pressure sensor (G410), a false signal may be sent to the controller, resulting in a reading that is out of tolerance. Model: 2007 Audi A4 Sedan V6-3.2L Scenario: The MIL is on and one or more of the following DTCs is stored in the engine control
Toyota: Rough idle, surging between 500 to 800 RPM
Model: 2005 Toyota Avalon and some models with similar system configurations, such as 2006 Camry models. Condition: The customer complains that the check engine light is on, rough idle and engine idle surging between 500 and 800 rpm. The technician retrieved DTCs P0171 & P0174 (System too lean, banks 1 & 2). Technician replaced the
