On my 94 V6 XLE Camry a DTC "P0401 Exhaust Gas Recirculation Flow Insufficient Detected" triggered as I deccelerated then accelerated on an inclined highway. Note that this event did not trigger while idle running or during other driving conditions. I've removed EGR valve and tested, it holds vaccume but valve leaks due to carbon deposits, I've also removed and tested EGR vacuum modulator, it holds vacume and seems good.
I've extracted following feeze frame data using a scan tool.
Freeze Frame Data
------------------ Fuel System 1: Closed Loop Fuel System 2: Closed Loop Load Value: 47.4% Coolant Temp: 176 F Short Term Fuel Trim 1: 0.8% Long Term Fuel Trim 1: 0.0% Short Term Fuel Trim 2: 0.8% Long Term Fuel Trim 2: 3.9% Engine RPM: 2283 RPM Vehicle Speed: 65 MPH Intake Air Temp: 41 F
If P0401 event is a symptom what could be the problem?
Thanks, IceMan