I have a 2001 Blazer and I cannot pass inspections (New York State) since my reader says that "EV" and "2A" are not ready.

I last reset the computer about 2 weeks ago and have driven about 500 miles (at various speeds) and these are not resettings. I recently had my gas tank, large amount of my power steering, exhaust, and a ball joint replaced.

Any ideas?

Thanks all

 

EV = EVAP system, and 2A = Secondary air system.

Performing the General Motors Driving Cycle will force all of the monitors to run and complete their tests. The steps do not need to be done in order, but each step must be performed exactly as written, with no variations. With a little practice and some careful planning, the cycle can be completed in about 15 or 20 minutes. After you have completed the cycle, if you did it right, all monitors will indicate "COMPLETE" or "READY". Each step explains what it tests, so if a monitor indicates incomplete, you only need to perform the steps that affect that particular monitor.

 

Thanks for the response. Dumb question, but which step would update the secondary air? I've tried to do them all, but I must be messing up on one of the steps.

 

Secondary air is not mentioned. Good catch! I've used that same drive cycle for years, and never noticed that, never had a problem with it either. Looked around in some publications and can't find anything on it. Not sure when it runs, but it's not in step 1. My guess would be step 2, and possibly others.

 

In the "GM Driving Cycle" they say to apply 1/2 & 3/4 throttle until 55 MPH is reached. Are they meaning a certain RPM or arbitrarily 1/2 & 3/4 pedal? Just curious.

 

Approximate is close enough. If you really want to, connect a scan tool and watch TPS %.

 

I ran through all the driving cycle tests a few times and still nothing. My mechanic checked all the fuses, and they are fine.

Someone suggested replacing the thermostat. Does this sound like a reasonable thing to do?

 

Normal coolant operating temperature is ~198F. If it does not regulate at that temp, it would make sense to replace the thermostat.

 

I just checked my receipts, and it looks like my thermostat was replaced 11 months ago.

 

Doesn't mean it didn't fail Best to check ECT on a scanner.