Ford Repair Questions? Ask a Mechanic for Answers ASAP
We have seen this problem many times. The following needs to be checked.
Get a volt meter on the O2 signal wire and see if the meter agrees with the DATA. If the O2 signal circuit has 1.13 V on it, try unplugging the O2 sensor from the harness and see if the voltage on DATA drops to 0.0 V. If the voltage changes, check the O2 harness connector for corrosion. Clean or replace the connector as needed.