Code 21
Problem with O2 sensor circuit. This code is stored in memory if no lean or rich condition is indicated for a 2-minute time period. This circuit is monitored when engine temperature is above 170°F (77°C) and engine speed is above 1500 RPM.
Problem with O2 sensor circuit. This code is stored in memory if no lean or rich condition is indicated for a 2-minute time period. This circuit is monitored when engine temperature is above 170°F (77°C) and engine speed is above 1500 RPM.