² When Monitored:
With the engine running in closed loop mode, the ambient/battery temperature above (-7°C) 20°F, altitude
below 8500 ft.
² Set Condition:
If the PCM multiplies short term compensation by long term adaptive as well as a purge fuel multiplier
and the result is below a certain value for 30 seconds over two trips, a freeze frame is stored, the MIL
illuminates and a trouble code is stored. Two Trip Fault. Three good trips to turn off the MIL.
ENGINE MECHANICAL PROBLEM
1/2 O2 SENSOR
(K141) O2 SENSOR 1/2 SIGNAL CIRCUIT
(K299) O2 1/2 HEATER CONTROL CIRCUIT
(K904) O2 DOWNSTREAM RETURN CIRCUIT
Take a look at the left rear (Downstream of cat) O2 sensor and it's wiring.