Getting po 401 and 402, 2000 camry 4cyl
Car had check engine light and I replace egr and the egr solenoid cleaned carbon from manifold but the codes came back. The car doesn't run rough anymore. What else would you check?
http://www.obd-codes.com/p0401 -- check this out for possible causes and solutions.
http://www.obd-codes.com/p0402 -- check this one out too. But since you showing both codes I might would check differential pressure sensor.
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