This 2001 Chevy Silverado 1500 5.3L with a check engine light on failed a California smog check for the functional portion of the smog check. The vehicle originally failed at another smog shop for “Not Ready”. Apparently a mechanic cleared the MIL and sent the customer on her way. After attempting to complete the drive cycle, the check engine light appeared with P1416 DTC.
Although we diagnosed the problem associated with the P1416 DTC, the Air injection monitor still would not complete. During the drive cycle, P0141 & P0161 pending DTCs appeared in the system. Upon testing oxygen sensor bank 1 sensor 2, our technician found high resistance within the heater circuit of the sensor.