P0491 Vw - How To Discuss

P0491 Vw

VW PAT codes P0491 and P0492?

It can be a solenoid valve or relay that starts the engine. If you see something here that looks like an electric jet or vacuum cleaner while driving on a cold day, the air pumps and relays are working.

The solenoid valve controls the air flow of the pump you are using under the vacuum, it can rot and cause this problem, and I will check to replace the expensive components first. Gone or not.

P0491 Vw

How to fix VW code P0491 Secondary Air Injection Low Flow

And this video will be diagnosing a p0491 secondary air injection low-flow on this Volkswagen Passat with a 2.5 L engine. First we verified the air injection...

P0491 Vw

This can be as simple as filling a filter. These codes are activated in a series. Dad always said it was cheap, worked until it became expensive. Turn off the relay on the power supply with another similar model. Still no change, find and test the ohm air valve.

This title may help.

P0491 Vw

P0491 Vw

VW PAT-CODE P0491 and P0492? 3

I have a 01VW Pat and the indicator light is on, so I took it to the auto zone to get the diagnosis and issue these 2 codes. One of them is P0491 and P0492. Indicates that a possible cause is a faulty air solenoid valve and faulty air system relay ... Could this be true? Or maybe something else?

This could be a solenoid valve or relay that starts the engine. If you see something here that looks like an electric jet or vacuum cleaner when you start the car on a cold day, the air pumps and relays are working.

The solenoid valve controls the air flow of the pump you are using under vacuum, it can rot and cause this problem and I will check first if you are replacing any expensive parts. ۔

This filtered filter can be as simple as that. These codes are activated in a series. My dad always said it's cheap, work is expensive. Turn off the relay with the same other model on the power supply. Still no change, find and test the Ohm Air Valve.

This topic can help.

P0491 Vw

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