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P0402 Diagnostic Trouble Code Discussion for May 2004

EGRC-BPT Valve Function

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Trouble Ticket Help Requests for DTC P0402
Help Request Posted
1999 Infiniti G20 2.0L Surge, MIL Lamp on VIN: JNKCP11A6X
P0402: EGRC-BPT Valve Function. ... opening right off of idle. code p0402 was set egrc backpressure transducer valve.this was replaced and still same problem. there is 3.5 inches of vacuum off of idle to bpt valve. less than 1/2 psi exhaust backpressure. egr opens enough to cause a vacuum le...
May 03, 2004
1997 Ford Contour GL 2.0L MIL Lamp on VIN: 1FALP6538V
P0402: excessive egr flow. ... problem. Both p0402 and p1780 present. Have tested vacuum solenoid(appears good). Removed vacuum hose from egr valve and installed gauge to hose. When rpm is raised, sufficient vacuum is present. When vacuum is applied to valve at idle vehicle stumbles and...
May 26, 2004