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 Check:
Check plug for connectivity- Make sure to use dielectric grease and that it is
‘Snapped’ together securely.
Make sure it is plugged into the correct plug on the harness-Wires should
be Black, Gray, Green w/ Violet Stripe
Test to make sure plug has 12 volts- Using a Voltage Tester, attach
Positive
clip to GRAY, and
Negative
clip to BLACK(ground).
Note: You must use the ‘Ground’ inside the plug to properly test plug.
