Code 21
Problem with oxygen sensor circuit. Code stored if no lean or rich condition is indicated for 2 minutes. Monitored when engine coolant temperature is above 170°F (77°C) with engine speed greater than 1500 RPM.
Problem with oxygen sensor circuit. Code stored if no lean or rich condition is indicated for 2 minutes. Monitored when engine coolant temperature is above 170°F (77°C) with engine speed greater than 1500 RPM.