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P0400 Diagnostic Trouble Code Discussion for March 2005

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBJ1368T
P0400: EGR System Performance. This tracker came in for emission test, failed for code PO400A,Egr flow. First pulled vac hose off egr and pulled vac on valve, engine stalled.Next tested transducer,bad.Ordered transducer and installed,cleared code,drove thru drive cycle,light reappeared and ...
March 26, 2005
1996 Geo Tracker 1.6L Surge, Cuts out, MIL Lamp on VIN: 2CNBJ1267T
P0400: EGR System Performance. ... while going down road. Does it more when warmed up.TPS has been replaced several times over last couple years. Code P0510 always comes back after several months and starts running the same. Noticed when driving that on scanner the CTP switch reading going ...
March 28, 2005