Code 29

Condition is: main oxygen sensor signal is more than 0.5 volt and sub-oxygen sensor signal is less than 0.5 volt with engine temperature more than 176°F (80°C), engine speed more than 1500 RPM and accelerator pedal fully depressed for 2 seconds. Probable cause: open or short in heater circuit of sub-heated oxygen sensor (right bank), defective sub-heated oxygen sensor (right bank) or defective ECM.