Conditions for Running the DTCs
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
- DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 is not set.
- The ignition voltage is greater than 10 volts.
- The engine speed is greater than 25 RPM.
- The HO2S 1 heater duty cycle is greater than 70 percent for more than 8 seconds.
- DTCs P0134 and P0154 run continuously when the conditions above exist for greater than 5 seconds.
Condition 2
- DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 is not set.
- The ignition voltage is greater than 10 volts.
- The engine speed is greater than 25 RPM.
- The HO2S 1 is warmed up for greater than 30 seconds.
- The HO2S 1 heater command is greater then 68 percent for greater than 8 seconds.
OR
- The calculated exhaust temperature is warmer than 600°C (1,112°F).
- DTCs P0134 and P0154 run continuously when the conditions above exist for greater than 5 seconds.
Condition 3
- DTC P0131, P0151, P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 is not set.
- The ignition voltage is greater than 10 volts.
- The engine speed is greater than 25 RPM.
- The HO2S 2 is at operating temperature.
- The air flow into the engine has exceeded 2,200 grams.
- DTCs P0134 and P0154 run continuously when the conditions above exist for greater than 5 seconds.