Error Code P2273
Paraphrased from the manual:
The PCM monitors the downstream O2 sensor. If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail. Two trip fault. Three good trips to turn off the MIL.
Possible Causes
OXYGEN SENSOR WIRING OR CONNECTORS
O2 SENSOR SIGNAL CIRCUIT
O2 SENSOR RETURN CIRCUIT
2/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)
The PCM monitors the downstream O2 sensor. If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail. Two trip fault. Three good trips to turn off the MIL.
Possible Causes
OXYGEN SENSOR WIRING OR CONNECTORS
O2 SENSOR SIGNAL CIRCUIT
O2 SENSOR RETURN CIRCUIT
2/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)
Just curious; does the cold air intake get its air from under the hood, like the OEM intake does?



