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P0402 Diagnostic Trouble Code Discussion for August 2005

EGRC-BPT Valve Function

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Trouble Ticket Help Requests for DTC P0402
Help Request Posted
1996 Mazda B4000 SE 4.0L MIL Lamp on VIN: 4F4DR17X9T
P0402: excessive EGR flow. ... on,pulled codes(listed above)found coolant temp sensor to be bad.replaced sensor. found egr valve to be severly rusted and not working,also found egr control valve to be leaking,replaced both,and egr tube as it was rusted and in bad shape also. cleared co...
August 10, 2005
1999 Mazda Protege DX 1.6L MIL Lamp on VIN: JM1BJ2226X
P0402: EGR System Excessive Flow At Idle Speed Detected. ... but when taken on long trip, after driving at 70 mph, the last time for 5 hours, it will set the code P0402- excessive EGR- We have performed the repair that is listed in the bulletin from Mazda and cleaned the EGR passage and intake manifold. We have repl...
August 23, 2005