Customer send his 997 due to "engine check light" pop up on speedometer, according the driver said it happened every few month and it's happened when it is at high RPM while cruising on express way.
From scanner what i got P2187 & P2189, immediately pointed air hose leakage, indeed it is an air hose didn't proper secure.
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| Hose disconnected on item number 4 |
This air hose is to actuate manifold flap, when the engine operating at high RPM, flap inside manifold will fully open, allow sufficient air flowing into combustion chamber to form correct A/F mixture.
Our case here are flap inside the manifold didn't function on time resulted incorrect A/F mixture form inside combustion chamber and caused 02 sensor trigger DTC P2187 & P2189.
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