P019B
O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 3
P019B is an OBD-II diagnostic trouble code meaning: O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 3. Common causes: oxygen sensor malfunction (bank 1 sensor 3), damaged or corroded sensor wiring harness. Estimated repair cost: $56–167.
Symptoms
- Increased fuel consumption
- Deterioration in engine dynamics
- Unstable idle
- Check Engine Light Is On
Causes
- Oxygen sensor malfunction (Bank 1 Sensor 3)
- Damaged or corroded sensor wiring harness
- Poor contact in the sensor connector
- Leaks in the exhaust system
- Problems with the fuel system (injectors, fuel pump)
How to Fix
- Check the condition of the oxygen sensor and its connector
- Inspect the wiring harness for damage
- Check the exhaust system for leaks
- Test the fuel system (pressure, injectors)
- If necessary, replace the oxygen sensor
Related codes
Error P019B by Vehicle Brand
FAQ
What does the P019B code mean?
P019B is an OBD-II diagnostic trouble code that indicates: O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 3
What causes a P019B error code?
The most common causes of P019B include: Oxygen sensor malfunction (Bank 1 Sensor 3); Damaged or corroded sensor wiring harness; Poor contact in the sensor connector; Leaks in the exhaust system.
How do I fix a P019B diagnostic trouble code?
To fix P019B: Check the condition of the oxygen sensor and its connector. Inspect the wiring harness for damage. Check the exhaust system for leaks. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P019B?
Limited driving only, diagnose soon
How much does it cost to fix P019B?
The estimated repair cost for P019B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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