Conditions for Running the DTC: P2237
WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- The ignition voltage is between 10.7-18.1 volts.
- The engine is running.
- HO2S 1 voltage is between 1.48-1.52 volts.
- HO2S 1 heater is at operating temperature.
- HO2S 1 closed loop is active.
- The catalyst temperature is stable.
AND
- DTCs P0030, P0031, P0032, P0053, P0133, P0135 are not set.
- The ignition voltage is between 10.7-18.1 volts.
- The engine is running.
- The Lambda parameter is 0.97-1.03.
- HO2S 1 heater is at operating temperature.
- HO2S 1 Closed Loop is active.
AND
- DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0335, P0336, P0338 are not set.
- The ignition voltage is between 10.7-18.1 volts.
- The engine is running.
- HO2S 1 heater is at operating temperature.
- HO2S 1 Closed Loop is active.
- Deceleration fuel cutoff (DFCO) has been active for 3 seconds.
- DTC P2237 runs continuously when the above conditions are met for 2 seconds.