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High idle - error showing on ECU

Brown Dog

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Friday was driving home, been driving for perhaps 30mins, and stopped at lights. Car idled at about 1500 RPM, then gradually settled to ~1000
So i fired up my ODB app and it shows an error P0507 Idle Air Control System RPM higher than expected.
Today, idle again was high - maybe 900. Resulting in engine light coming on.
A few short trips later, light is off. Idle normal for now.

My phone has saved the error if I need to speak to a dealer
Weird eh.
 

Brown Dog

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so what might cause this? no obvious loose hoses
 

krusing

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Air intake error,
Dodgy fuel,
Sticking injector,
Sticking Throttle butterfly ,
Throttle Peddle sticking, resistance error being drive by wire,
Vacuum leak, where if it was a serious leak, it would of idled longer, but never the less, never assume,
Where do you start.
 

SSteve

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This happened once to me. (Approx 12 months ago) Just like you explained above. Has never happened since
 
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