CODE 12- RPM SIGNAL
Code 12 is caused by loss of "G" or "NE" signal from distributor to ECU for at least 2 seconds after starter signal is received at ECU. Check distributor and ignition system components. Ensure starter signal (STA) exists at ECU.
CODE 25 - LEAN AIR/FUEL MIXTURE
Loose Engine Ground
Open E1 Circuit
Open Injector Circuit
Fuel Line Pressure (Blocked Injector)
Open Or Short In Oxygen Sensor Or Circuit
Coolant Temperature Sensor
Airflow Meter Or Air Intake System (3VZ-FE)
Vacuum Sensor (5S-FE)
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Friday, November 16th, 2012 AT 11:17 AM