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P1406 Diagnostic Trouble Code Discussion for August 2010

EGR Valve Pintle Position Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1406
Help Request Posted
1994 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52L0R
P1406: EGR pintle position error. Heres my problem. EGR valve will not open when on engine. Remove EGR valve and it opens normally and pintle position matches commanded EGR. All supply voltages and grounds are the same mounted or unmounted. This valve will only go on one way. What could I be m...
August 27, 2010