![]() I don't know what the boost sensor values should be, but I don't see any red flags. The EGR solenoid appears to function normally, the EGR valve actuates, and the boost sensor output is linear (attached). I've also modified the speeds and durations with no success in bringing the system to ready. I have followed drive cycle listed here (). I don't know if this has been the case all along, or a new issue. I have finally purchased a decent OBD scanner and have learned that after about 300 miles the EGR and only the EGR is 'not ready'. I have tried cleaning the upper and lower intake manifold, cleaning the EGR, cleaning the MAF (thinking discrepancy of expected air tripping excessive/insufficient triggers could be caused by an erroneous MAF) relocating the vacuum line and cursing like a sailor. Usually, after resetting the CEL it takes 500-1000 miles to come back. She throws both P0401 and P0402 at what appears to be random. I have a 2000 NB, 107,000 miles which has suffered from a recurring EGR issue since I bought it 2 years and 7,000 miles ago. Hello all! First time poster, long time lurker.
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