P019B
Generic code
Free on OBD DashX
Want real-world data on P019B?
See which problems come with P019B, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P019B means
- 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
Possible solutions
- Poor fuel economy
- Engine misfires or stumbles
- Rough idle or hesitation
- Check Engine Light (CEL) illumination
- Decreased engine performance
Free on OBD DashX
P019B on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P019B No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.