check engine light O2 code again

[alexander]

This '96 Q with 153k miles popped the check engine light again ( 3rd time),with the codes P0130 o2 sensor S1 problem.O2's were replaced last year, all 4 of them. Last service when light came on tech found a 'loose air intake boot' Clear codes no service charge.Sensors checked out OK again.Diagnosis seems to be leading no where.No noticably problems at all with Q.Any ideas what they should look for now, before I pick it up with engine light still on????

[maxnix]

First, they need to reset the ECU.

Second, you need to find a G50 expert like Jerry Tucker's shop, T-3, or Van Meter.

1996 OBD II is a unique and strange bird. But I bet it is not your O2 sensors. Check the connections just to be sure.