For 1990-2009 cars

Insert graphic sio SMITL54321AA

The oxygen sensor 1 (02S-1) is an electrical source that responds to oxygen content in the exhaust manifold. When the sensor reaches approximately 316°C (600°F), it produces a voltage based on the difference in oxygen between the atmosphere and exhaust gas. The PCM sends a bias voltage (399-499 mV) on the signal line, which is pulled up through high resistance. When the O2S-1 is cold, it produces no voltage and has extremely high internal resistance. The internal resistance of the sensor is much greater than the resistance of the bias pull-up resistor. However, when the sensor heats up, it produces voltage that overrides the bias voltage. This voltage is read by the PCM to determine a rich/lean O2S-1 signal used to adjust injector pulse width. Under normal conditions, low sensor voltage means high oxygen content/lean air-fuel mixture and vice versa. Normal sensor readings will fluctuate between 10-1065 mV. DTC P0130 will set when the O2S-1 signal is not consistently fluctuating out of the 300-600 mV range necessary for closed loop fuel control.

### Conditions for Setting the DTC

DTC P0130 will set if O2S-1 voltage is not consistently fluctuating outside 300-600 mV when:

• | The condition exists for longer than 5 seconds.

• | Engine run time is greater than 2 minutes and 20 seconds.

• | Engine speed is between 1,200-3,410 RPM.

• | The ECT is greater than 65°C (149°F).

• | The TP angle is between 10-40 percent.

• | No CKP, ECT, EVAP, fuel injector, knock, MAP, misfire, O2S-1, PCM internal fault, TP, or P0502 DTCs have been set.

DTC P0130 diagnostic runs continuously once the above conditions have been met.

DTC P0130 is a type B DTC.

### Diagnostic Aids

Important: An intermittent open in the signal or ground wire, as well as an inactive sensor, will not set this DTC.

The most probable cause for DTC P0130 is contamination. Check for obvious contamination, oil, fuel, or engine coolant, by removing the sensor. Identify and correct the cause of the contamination if contaminated. Replace the O2S-1.