2019 Nissan Altima SL Check Engine Light Code P219a

DTC P219A Nissan: Possible Causes and Solutions


The DTC P219A in Nissan vehicles is an OBDII code indicating a lean/rich air-fuel ratio imbalance in Cylinder A of Bank 1. While the causes listed below may not cover all potential issues, they provide a comprehensive starting point for diagnosis.

Possible Causes

  1. Fuel Injector: Ensure proper functioning and inspect for any issues.
  2. Exhaust Gas Leaks: Check for leaks in the exhaust system.
  3. Incorrect Fuel Pressure: Verify fuel pressure levels for accuracy.
  4. Mass Air Flow Sensor: Inspect for correct operation.
  5. Intake Air Leaks: Check for leaks in the intake system.
  6. Lack of Fuel: Confirm fuel availability and delivery.
  7. Incorrect PCV Hose Connection: Ensure proper Positive Crankcase Ventilation hose connection.
  8. Improper Spark Plug: Inspect spark plugs for correct installation.
  9. Insufficient Compression: Check engine compression levels.
  10. Fuel Injector Circuit Issues: Investigate any open or short circuits.
  11. Ignition Coil: Verify proper functioning.
  12. Ignition Signal Circuit Issues: Check for open or short circuits.

Diagnosis and Repair

  • Visually inspect wiring harness and connectors related to the listed causes.
  • Look for damaged components and check connector pins for issues.

Check Engine Light in a 2019 Nissan Altima: Causes and Solutions


The check engine light in a 2019 Nissan Altima is a part of the onboard diagnostics system, signifying potential issues in the vehicle’s performance. Understanding the causes can help in timely diagnosis and resolution.

Causes of Check Engine Light

  1. Gas Cap Issues: Ensure the cap is properly tightened or replace if damaged.
  2. Vacuum Leak: Check for high RPM or surges, indicating a possible vacuum leak.
  3. Low or Dead Battery: Address battery issues promptly.
  4. Spark Plug or Plug Wires: Replace if worn for improved performance.
  5. Mass Airflow Sensor (MAF) Replacement: Address starting or idling issues.
  6. O2 Sensor Replacement: Prevent damage to the catalytic converter and improve fuel economy.
  7. Catalytic Converter Issues: Timely inspection to avoid engine performance issues.
  8. Aftermarket Items Concerns: Ensure correct installation to prevent vehicle issues.

Diagnosing Check Engine Light

  • Use an electronic scan tool to retrieve engine codes.
  • Seek professional help for a thorough diagnosis.
  • Immediate attention is recommended to prevent major engine damage.

Cost and Additional Information

Cost of Diagnosing DTC P219A Nissan

  • Labor typically involves 1.0 hour, with costs ranging between $75 and $150 per hour.

Cost of Checking the Check Engine Light

  • The average cost for diagnosis and testing is between $88 and $111.
  • Coggin Nissan at the Avenues offers complimentary multi-point inspections and free diagnostics in most cases.

Additional Information

  • Addressing check engine light promptly prevents potential costly repairs.
  • Hundreds of OBD codes exist; professional diagnosis is crucial.
  • Regular maintenance and prompt attention to warning lights contribute to vehicle longevity.

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