Without Electronically Controlled Transmission

Injector Drive Circuit:

Injector drive circuit

Oxygen Sensor Signal Inspection:

Oxygen sensor circuit

This combination of procedures is used to determine the cause of the mixture related fault, O2 signal or injector malfunction.

Improper fuel system pressure and operation and well as evaporative control malfunction may cause these codes as well.

Code 25 & 26 Detection Driving Pattern - CA:

Detection Driving Pattern