2011 Chevy Silverado 5.L P219A P219B

2011 Chevy Silverado

Chevy Silverado

On the 2011 Chevy Silverado with the 5.3L engine, the P219A and P219B codes are both related. These codes are saying that the fuel-air ratio to both banks is incorrect and unbalanced. There are a few different things that can cause this issue. Things that will need to be checked:

  • Inspect the air induction system for modified, damaged, leaking, or restricted components

  • Inspect the crankcase ventilation system for improper operation.

  • Inspect the vacuum hoses for splits, kinks, and improper connections.

  • Inspect for vacuum leaks at the intake manifold, the throttle body, and the injector O-rings.

  • Test for a restricted, damaged, leaking, or modified exhaust system from the catalytic converter forward.

  • Test the fuel injectors for improper operation.

  • Test for fuel contamination.

  • Test for excessive fuel in the crankcase due to leaking injectors.

  • Test the ignition system for improper operation.

  • Test the engine for any mechanical conditions such as sticking valves, lifters, etc., which could alter the flow into the combustion chamber.

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