I just picked up an OBDII code reader today and it showed the 0400 code, which is EGR Flow Malfunction. I have Edelbrock shorties and all the connections have been checked over. I havent had an SES light in about 2 months, and just cleared the code. I have to get the car inspected by the end of August. I was just curious if previous codes will show when getting it inspected? And if anyone in the Houston area can program out the EGR I would appretiate and you would be compensated.

 

As long as it doesn't show up, I never heard of a cleared code being looked at as grounds for not geting a clear inspection. Sometimes the code clears by itself after the computer adjusts. That could be why the code has not returned after you have reset it with the reader. Once a code is cleared I haven't seen where they can retreive it again. If the code reader can't see it I don't know why the inspector's reader could see it either. For that mater, from what I hear, no light no foul. So you should be ok.

 

I'm an inspector, but in Bastrop, and if the SES light's not on, there should be no reason to fail it based on that.

 

As for the code: Here's what Service Information has for the P0400:

Conditions for Clearing the MIL/DTC
The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
Diagnostic Aids
Suction from shop exhaust hoses can alter back pressure and may affect the operation of the EGR valve during in-stall testing. This DTC can be set by a leaking exhaust system because an exhaust leak alters back pressure. Thoroughly check the exhaust system for leaks. Refer to Section 6F, Exhaust System.
Vacuum lines should be thoroughly checked for proper routing. The vacuum source goes to the orifice side of the solenoid valve. Refer to the Vehicle Emissions Control Information label.
Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If the DTC cannot be duplicated, the information included in the Freeze Frame and/or Failure Records data can be useful in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also be used to determine how many ignition cycles the diagnostic reported a pass and/or a fail. Operate vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that were noted. This will isolate when the DTC failed.
A leaking EGR valve pipe assembly will cause an exhaust leak and can reduce EGR flow volume. Refer to Section 6A, Engine On-Vehicle Service if this condition is noted.