Question about 2001 GMC Jimmy

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I need a link or a better explanation on the code that poped up on my 2001 gmc jimmy, code is PO410B, the explanation the reader gave me was, secondary air injection reaction injection system incorrect flow detected. I need to know how to fix the problem. Its a 2001 gmc jimmy, 4 door V6 4X4, any help email me wiyh answer or link at camster22@yahoo.com. Thanks.

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What does that mean? The P0410 code refers to the emissions system. The AIR pump puts air to the exhaust to lower emissions. It takes in outside air and pumps it through two one-way check valves into each bank of the exhaust.
About 90% of the time that this code is set, the one-way check valves have worn out or failed and allow water (which occurs naturally in the exhaust) back into the pump. In any cold climate, especially in climates with higher humidity, this water may be more excessive. The water partially fills the AIR pump, it can then freeze. When the PCM commands the pump on, if the pump is frozen it cannot turn, thus overloading the circuit and "popping" the fuse.
I need a link or a better explanation on the code - copyscape.gif Symptoms Possibly symptoms include:

  • MIL illumination obviously
  • Hesitation on acceleration
  • Noise from a bad/stuck AIR pump
Causes A code P0410 may mean that one or more of the following has happened:
  • Water may have collected in the AIR pump or the vent solenoid and frozen or corroded the pump
  • Blown AIR pump fuse due to freezing up
Possible Solutions Note: There is a technical service bulletin (TSB) regarding this code for a number of GM models. The TSB calls for the replacement of the AIR pump and the installation of a new secondary injection hose. The TSB can be found on this ACDelco site.
Additionally, if you simply replace the AIR pump the problem may return again (and again). If you replace the pump, also clean out the hoses and replace the one-way check valve. If this is on a GM model that the TSB applies to, follow those instructions in the link above. In a few cases, people have put a small hole in the rubber cover on the pump which allows any water to drain out.
Also, please note that this may be covered under the emissions warranty on the vehicle. If your vehicle is out of bumper-to-bumper warranty, check if the emissions warranty is still valid!
  • Replace the AIR pump AND one-way check valve
  • Test and clean the AIR pump AND test and replace the one-way air check valve
  • Replace the AIR pump inlet hose
  • Replace the AIR pump fuse (found under the hood)

Posted on Mar 06, 2009

  • jmspinche Apr 17, 2011

    I have the same problem on my jimmy. replaced everything above, but the mil light is still on. i also replaced the pcv valve, cat. converter and a year ago the fuel pump. the only code i get is p410 and because of that i can't pass the emissions test.

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This is the general emissions exhaust code, what is the actual issue you are having with the vehicle? have you tried to reset the code and see if it happens again? if so when you reset it does the vehicle run better then code pops and car runs worse or no change? let me know and i'll help you out

Posted on Mar 06, 2009

  • djf975 Apr 08, 2011

    Help replaced air pump, in 01 Jimmy, relay, selenoid, valves, fuses, disconnect battery to get the check engine light out 4 days later engine light back on. my 60days on sticker is running out and $ 360 later

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