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P0402, excessive EGR flow

P1404, EGR range performance, valve closed

Most of the time I find the EGR port in intake clogged. If you look in throttle body you will see a 3/8 tube plugged with soot. Clean and reset with scan tool.

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16y ago
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Q: What does Diagnostic code P0402 and P1404 mean on a 2000 Isuzu Rodeo?
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