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Q: 2000 Toyota Camry code PO401 on 2000 Toyota Camry

Replaced NEW the following - EGR Valve - EGR selenoid behind engine - EGR vacume modulator - Mapping sensor - removed the EGR Tube into exhaust manifold was clear,EGR port clear, checked all hoses from EGR modulator / EGR / EGR selenoid all clear no leaks -- clear computer codes comes back after driving aprox 15 miles.. Iam a shade tree mechanic need advice !! HELP
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Circuit to the solenoid problem i say! Loose connection or broken/burnt wire. This is not a common problem on this engine, at least not at the shop. As a rule ECM and the EGR, amoung most things, are very reliable. However anything can happen in this business!
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