Test Description

WARNING: This page is about a different variant/trim than selected.

NOTE: Test numbers refer to numbers on diagnostic chart.

If Codes P0135 and P0155 are also set, ignition feed circuit to heated oxygen sensors may be open. Check oxygen sensor fuse located in instrument panel fuse block. Sensor voltage should change from a bias voltage to less than .3 volt or greater than .7 volt within 100 seconds if engine coolant temperature is greater than 154°F (68°C), or within 240 seconds if engine coolant temperature is -40°F (-40°C).
A contaminated sensor should be replaced and condition causing contamination repaired (silicone, lead, engine oil and coolant, etc.).

Fig 1: Code P0161 Schematic (Corvette) Bank 2 Oxygen Sensor No. 2 Heater Circuit Malfunction

Fig 2: Code P0161 Diagnostic Flow Chart (Corvette) Bank 2 Oxygen Sensor No. 2 Heater Circuit Malfunction