Diagnostic Aids

WARNING: This page is about a different car, the 1992 Pontiac Grand Prix, 1992 Oldsmobile Cutlass Supreme, and 1992 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.

Control module will not go into closed loop if Code 13 is set. Code 13 may set if vehicle runs out of fuel or stalls while vehicle is in motion. If O2 sensor ground becomes loose, a false O2 sensor reading will occur. This can result in a Code 13 being set.

Fig 1: Code 13, Schematic, Open Oxygen (O2) Sensor Circuit

Fig 2: Code 13, Flow Chart, Open Oxygen (O2) Sensor Circuit

Fig 3: Code 13 Flow Chart