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2007 D4D Engine Light

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Hi, Wondering if anyone has any ideas how to go about fixing my Yaris (2007 d4d tspirit 54k miles)

For the last week or two, it randomly pops up the engine warning light, and then goes into safe mode (reduced power and wont rev above 3000rpm)

I have had the codes read and they are PO487 and PO488, sometimes the codes can be cleared and all works fine for a week or a day, then the light returns and low power again.

Any ideas on what I should be looking for?

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Hmm sounds like the egr throttle position sensor

you may need a new A new Throttle Body / Intake Shutter

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