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Discussion Starter · #1 ·
Just recently my mechanic replaced my intake manifold gasket and the valley gasket. I drove the car for about an hour, didn't notice anything unusual, then my car sat for 2 days until I got my new wheels and tires. Drove the car yesterday and after a few minutes I got a SES light, when I got home I scanned it and it came up P0410, I read somewhere about not touching a box on the backside of the engine, for it may mess something up with the AIR, Im not sure about this information, but is there anything mechanic could have hit or touched while he was doing my gaskets? I just had this car inspected a few weeks ago, so is there any danger of just letting this code go? I appreciate any and all answers. Thank you
 

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Since you have an obd2 code, we know your car is 96 or newer. But to properly help you, we need to know if you have a lt1 or ls1 car, and what year.
 

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Discussion Starter · #3 ·
oops, hardly got any sleep when I typed that, my apologies, it is a 2000 Formula with the LS1. Also, would it be possible for me to have the AIR tuned out while still keeping everything in the engine bay? ( I know of people removing the AIR system, but I need it at least visually for emissions tests here in the great state of PA.
 

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P0410

Description

Secondary Air Injection (AIR) system.
The control module activates the Secondary Air Injection System by grounding both the pump relay and the vacuum control solenoid control circuits simultaneously. This energizes the pump and the vacuum control solenoid. Vacuum is then applied, opening the valves. The pump then force fresh air into the exhaust system in order to accelerate catalyst operation. The control module will run up to 3 diagnostic tests using the pre-catalyst HO2S voltage and Short Term Fuel Trim (FT) to diagnose the system.

Symptoms

  • The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostics test has been run and failed.
  • The PCM will store conditions which were present when the DTC set as Freeze Frame and Failure Records Data.
  • If the misfire is determined to be catalyst damaging, the PCM will flash the MIL.

Causes

  • The pre-catalyst HO2S voltage remains above a predetermined lean value during the test AND
  • The Short Term FT does not increase a calibrated amount during the test.
  • Both conditions above exist for 3 consecutive tests.
Solutions

  • Visually inspect for the following:
    • Damage
    • Loose or restricted AIR pipes/hoses
    • Loose or restricted vacuum lines
      • If problems found, correct and clear the DTC.
      • If problems not found a scan tool will be needed to command air pump relay ON and OFF
  • From this point forward, 42 separate tests are required to isolate the DTC from a vacuum or AIR pump problem associated with the relays, command modules and feed circuits.
  • Check feed fuses and replace. If fuse fails again, a diagnostic via a TECH II is recommended.
 

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It is quite possible the the AIR system cutoff valve which is at the rear of the driver side cylinder head, has been disturbed, or one of the 3 pipes. Do you hear the AIR pump run when the engine is cold and just started (for 2 minutes)?
 
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