Expert: Sean Halliday - 4/7/2009

Question
I/we have a 99 toyota camry that has check engine light on, and sometimes bucks/jerks at steady throttle. Semms to be smooth on accelleration and seems to sometimes act like it shuts off going slow under compression, but not always.I did get some codes as P0171; P0401; P0441; P0446; P1133. Is there a place that can tell me how to repair any of the things that might be at fault, and what might the fault be?

Answer
Many problems.the first code po171,lean cylinder bank one,p0401egr fault,po441,evap flow incorrect,p0446,evap vent incorrect,p1133 is the air/fuel sensor.This would be a job for a experienced tech,as its a complex problem.3 bad components or one causing the others to react ,the mass air meter can do this and i would not run the car like this as it can cause serious engine damage.First i would make sure everything is connected and no vacuum leaks also make sure all the plugs are connected especially the air sensor.Look for tears in the rubber vacuum hoses.Make sure the gas cap is ok.