Can Vacuum Leak Cause P0420 at Paige Odriscoll blog

Can Vacuum Leak Cause P0420. Start the engine and use your ears to detect hissing noises around the engine bay, particularly near the intake. Common sources of air leaks into the exhaust that can skew the ecm’s tests are damaged flex pipes and stripped or damaged sensor threads. The p0420 code means your car’s catalytic converter on one side of the engine isn’t cleaning up pollution as well as it should. In most cases a high long term fuel trim means the engine is getting too much. High pitch noise from the engine. Anything over +10% indicates a problem. If you have high fuel trims, find out why before replacing anything! Check for vacuum leaks and intake air duct leaks that would cause the ecm to add fuel.

Pinhole Leak Cause P0420? r/MechanicAdvice
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The p0420 code means your car’s catalytic converter on one side of the engine isn’t cleaning up pollution as well as it should. Anything over +10% indicates a problem. In most cases a high long term fuel trim means the engine is getting too much. Common sources of air leaks into the exhaust that can skew the ecm’s tests are damaged flex pipes and stripped or damaged sensor threads. Check for vacuum leaks and intake air duct leaks that would cause the ecm to add fuel. Start the engine and use your ears to detect hissing noises around the engine bay, particularly near the intake. If you have high fuel trims, find out why before replacing anything! High pitch noise from the engine.

Pinhole Leak Cause P0420? r/MechanicAdvice

Can Vacuum Leak Cause P0420 In most cases a high long term fuel trim means the engine is getting too much. Common sources of air leaks into the exhaust that can skew the ecm’s tests are damaged flex pipes and stripped or damaged sensor threads. High pitch noise from the engine. Start the engine and use your ears to detect hissing noises around the engine bay, particularly near the intake. If you have high fuel trims, find out why before replacing anything! Anything over +10% indicates a problem. In most cases a high long term fuel trim means the engine is getting too much. The p0420 code means your car’s catalytic converter on one side of the engine isn’t cleaning up pollution as well as it should. Check for vacuum leaks and intake air duct leaks that would cause the ecm to add fuel.

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