Vehicle: 2019 Toyota Avalon Limited
Mileage: ~127,900 miles
Issue Summary:
Vehicle is experiencing intermittent check engine light along with fuel trim imbalance and misfire conditions affecting Bank 2.
Details:
The check engine light comes on and off intermittently without consistent drivability issues. The engine generally runs normal, but diagnostic data shows positive fuel trims on Bank 2 (approximately +10% to +15%), indicating the engine is compensating for a lean condition.
The issue appears to be localized to Bank 2, specifically Cylinder 4. The condition is intermittent and sometimes clears after refueling or normal driving. No major loss of power or rough running has been consistently observed.
Concern:
The combination of fuel trim imbalance and cylinder-specific misfire suggests a developing issue with combustion on Bank 2. At this mileage, this may indicate premature failure of ignition or fuel system components (such as ignition coil, spark plug, or injector).
Impact:
While currently intermittent, the issue may lead to worsening performance, reduced fuel efficiency, or potential long-term engine damage if not addressed.
A D V E R T I S E M E N T S
Vehicle: 2019 Toyota Avalon Limited Mileage: ~127,900 miles
Issue Summary: Vehicle is experiencing intermittent check engine light along with fuel trim imbalance and misfire conditions affecting Bank 2.
Details: The check engine light comes on and off intermittently without consistent drivability issues. The engine generally runs normal, but diagnostic data shows positive fuel trims on Bank 2 (approximately +10% to +15%), indicating the engine is compensating for a lean condition.
A scan report shows the following codes:
* P11EB – Bank 2 Air-Fuel Ratio Imbalance (Port Injection) * P0300 – Random/Multiple Cylinder Misfire * P0304 – Cylinder 4 Misfire
The issue appears to be localized to Bank 2, specifically Cylinder 4. The condition is intermittent and sometimes clears after refueling or normal driving. No major loss of power or rough running has been consistently observed.
Concern: The combination of fuel trim imbalance and cylinder-specific misfire suggests a developing issue with combustion on Bank 2. At this mileage, this may indicate premature failure of ignition or fuel system components (such as ignition coil, spark plug, or injector).
Impact: While currently intermittent, the issue may lead to worsening performance, reduced fuel efficiency, or potential long-term engine damage if not addressed.
- Jaime P., Lake Jackson, TX, US