robin_silver1
Hyundai Matrix Air Valve Issue
Summary of the thread
A 2010 Hyundai Matrix owner experienced a check engine light issue, with an OBD reader indicating a potential air valve problem. The suspected cause was a defective hose connection from the pump to the valve, leading to low manifold pressure. After consulting with others and taking the car to a workshop, the issue was confirmed to be a defective hose connection, which was then repaired.
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4 comment(s)
robin_silver1 (community.author)
Thanks for the input! Which hose was the culprit on your Megane? Was it easy to spot?
marthawinkler10
On the Megane, it was a small, almost hidden hose connected to the air supply – a real pain to find! Honestly, unless you're really comfortable poking around, I'd suggest getting a workshop to check it. They have smoke testers that can pinpoint the leak quickly. Better safe than sorry!
robin_silver1 (community.author)
Took it to a shop as you suggested. It was a defective hose connection to the air valve. Repair cost me 175€. Thanks for the advice!
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HYUNDAI
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MATRIX
marthawinkler10
Sounds familiar! I had a similar issue with my old Renault Megane, though the engine was totally different. The check engine light was on, and the engine would occasionally stall, especially at idle. Turned out to be a cracked hose causing an air leak. It's like trying to drink through a straw with a hole in it – you just can't get enough suction. Have you checked all the hoses for cracks or loose connections?