Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)

FAULT ID
P0130

TITLE
Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1)

BACKGROUND
- When the oxygen sensor begins to deteriorate, the oxygen sensor signal response becomes poor.
- The engine control module forcibly varies the air/fuel mixture to make it leaner and richer, and checks the response speed of the oxygen sensor. In addition, the engine control module also checks for an open circuit in the oxygen sensor output line.

RANGE OF CHECK & SET CONDITIONS
The response of the oxygen sensor signal is slow when the amount of fuel injected is increased or decreased by an override during closed-loop control of the air fuel ratio. The oxygen sensor output line is open-circuit.

EFFECT
Limp-in
- Air/fuel ratio close loop control is not performed.

PROBABLE CAUSES
- Heated oxygen sensor deteriorated.
- Open circuit in oxygen sensor output line.
- Engine control module failed.