P019B

2017-10-10

Description:

  • O2 Sensor Delayed Response Lean to Rich Bank 1 Sensor 3

Possible Symptoms:

  • Check and replace the oxygen sensor (Bank 1 Sensor 3).

  • Inspect the wiring and connections associated with the oxygen sensor.

  • Clean or replace the Mass Air Flow (MAF) sensor.

  • Check for any exhaust leaks and fix them.

Possible Causes:

  • Faulty oxygen sensor in Bank 1 Sensor 3

  • Damaged or malfunctioning catalytic converter

  • Vacuum leak in the intake manifold

  • Fuel injector issues, such as clogging or malfunction

  • Faulty engine control module (ECM) or oxygen sensor heater circuit malfunction

Related Parts:

Possible Solutions:

  • Poor fuel economy

  • Engine misfires or stumbles

  • Rough idle or hesitation

  • Check Engine Light (CEL) illumination

  • Decreased engine performance

Search