julia_ghost1

Matrix Check Engine Light Air Valve

Hey, my 2003 Toyota Matrix with a gasoline engine has the check engine light on. I'm thinking it's an air valve issue, maybe a vacuum leak somewhere?

The check engine light on a 2003 Toyota Matrix was suspected to be caused by an air valve issue, possibly due to a vacuum leak. The problem was identified as a defective hose connecting the pump to the valve. The solution involved checking and replacing the faulty hose, which resolved the issue.

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4 comment(s)

I had a similar problem with my Toyota Corolla. Check all the vacuum hoses, especially the ones connected to the air intake. Could be a split or loose connection.

Where exactly are those hoses located? And which air valve are we talking about?

It's the hose connection from the pump to the valve. If the hoses look okay, it could be the valve itself. Honestly, I'd get it checked by a workshop. It's a pain to diagnose without the right tools.

Thanks, I'll check those hoses first. Took it to a shop, and it was indeed a defective hose – the connection from pump to valve. Cost 175€ to fix.

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TOYOTA

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MATRIX