help 1992 code 63

[church]

I have replaced o2 sensors had ecm checked ecm good . I drive the car for about 5 miles & ses lite comes on . do the paper clip trick & get code 63 . all wireing check ok . I need help . thanks for any info that can point me in right direction .

 

[Hib Halverson]

Code 63 is a fault with the O2 sensor for the right bank. It sets when the rt. side sensor voltage stays between 350 and 550 Mv for 60 at least 60-sec after a 2-minute run time.

It can be caused by an open in either the rt. sensor signal line or the ECM ground. Also, it can be caused by a faulty ECM.

Since you replaced both sensors and you say the ECM is good, I'd look for an open in the right-side sensor signal line or and open in the sensor ground.

 

[church]

what is the best way to check signal line & sensor ground