Question about 2002 Nissan Frontier Crew Cab
SERVICE ENG SOON CODE P0402
Sounds like a problem in the egr valve or the porting through the egr valve or maybe a vaccuum line that has something to do with monitoring it. make sure there are no vacuum lines near it that are leaking and is there a difference in the idle that you may notice.
Posted on Feb 26, 2009
If too much EGR flow exists due to an EGRC-BPT valve malfunction, off idle engine roughness will increase.
If the roughness is large, then the vacuum to the EGR valve is interrupted through the EGRC-solenoid valve.
If the engine roughness is reduced at that time, the EGRC-BPT valve malfunction is indicated.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0402 The EGRC-BPT valve does not operate properly. EGRC-BPT valve
Loose or disconnected rubber tube
Blocked rubber tube
Camshaft position sensor
Blocked exhaust system
Mass air flow sensor
Posted on Jan 17, 2010
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Posted on Jan 02, 2017
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