P0134

Tests 1 - 4:

Tests 5 - 8:

SYMPTOM
P0134-1/1 O(2) SENSOR STAYS AT CENTER

WHEN MONITORED
Engine running for greater than 121 second. Coolant Temperature greater than 66 °C (150.8 °F). Engine in closed loop fuel control mode.

SET CONDITION
O(2) signal voltage is between .35 volt and .58 volt for a total of 30 seconds and then O(2) signal volt is 1.5 volts for 60 seconds. One trip fault.

POSSIBLE CAUSES
- Intermittent Condition
- O(2) Sensor Operation
- O(2) Sensor Ground Circuit Open
- O(2) Sensor Signal Open
- O(2) Sensor Ground Circuit Voltage Drop
- O(2) Sensor Signal Circuit Voltage Drop
- PCM