O2 Sensor Testing If your engine has unexpectedly started to run poorly, an O2 Sensor Test should be performed. IMPORTANT: Testing the O2 sensors us
AFR value is constantly 22.05 on “both cylinders”. O2 sensors NOT plugged in. O2 module not connected to DATA PLUG properly. O2 module DATA
Verify your O2 Module Connection. Make sure you have the plug completely seated and screwed in tightly. NOTE: Screws should be slightly ‘counter
Determine which is bad, O2 Sensor or O2 Harness A basic “Swap and Test” procedure can be used to isolate “which” component is faulty, the O2 Sensor
Initialization Test of O2 Sensors Throttle by Cable, SmartLink Software 1. Connect computer interface cable to the module. 2. Turn ignition switc
If you are getting a constant AFR reading of 9.30 on both cylinders, the ECM is not getting a signal from the Data Port on the O2 Module. How to C
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