System Pressure Sensor Circuit Low Input is now set after more than 15 seconds. This test monitors the number of high resolution pulses which have been missed not detected. Testing the one way check valves is also critical to making a thorough diagnosis. Enter the 5 character trouble codes in the search box and submit the search. Afterwards let them air dry, get some dielectric grease same stuff they use for light bulb sockets and spark plug wires and put some where the terminals come into contact.
If the pump runs, find another relay identical to the one removed from the A. Visually inspect Air Pump for broken or loose Air Pump Belt. I removed my hood and used two small kitchen type ladders with a plank across to work on all that Secondary Air Injection stuff. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. With the engine idling, put a vacuum gauge in place of the combination valve.
This amount is set by the manufacturer. We are not responsible for any actions you take on your vehicle. Need help with a P0411 code? I had these codes on my 96 as well. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. The list of automotive Makes at the right edge of the screen. With some vehicles, a slight engine hesitation upon acceleration may be noticed. The information contained on this site is presented for informational purposes only.
Thus, to test, one needs a data streaming tool during a cold startup. This is an actuator test. I have been driving and resetting, driving and resetting, driving and resetting waiting for the snow to finally melt to tackle this problem. Good Luck Edited May 23, 2011 by Rons beast By any chance do you have the name and address of the engineer that suggested putting the diverter valve between the engine and the firewall? If all tests have passed so far, and you continue to get a P0411 code, this would most likely indicate a failed A. Common Misdiagnosis Secondary air injection pump replacement, without fabricating a water drain on the pump housing, may lead to repeated pump failure.
If these codes are present, diagnose them before attempting to diagnose the P0411. Possible causes: --Vacuum hoses damaged. If you have any doubt as to repairs on your vehicle, please contact your technician. Most of the time the only symptom that is noticed is the Check Engine Light with no other adverse symptoms present. How does a mechanic diagnose the P0411 code? See if they look corroded, burnt or possibly green in color versus the normal metal color you are probably used to seeing. The secondary air injection system uses ambient air, which is pumped into the engine exhaust, to reduce emissions.
Repair the cause of the short and retest. The Powertrain Control Module P0411 code. Technicians use this information to test the air injection system and determine which part is not functioning as designed. Apply and release vacuum to the valve repeatedly. A professional level scan tool is needed to properly diagnose the secondary air injection system. Definition Secondary Air Injection is actually an emission control that uses a pump to send fresh outside air to the to the exhaust manifolds or exhaust ports during cold engine start up, or when the engine is in open loop and pre-catalytic converter during in closed loop.
As each cylinder comes up on the exhaust stroke, air should be felt coming from the spark plug hole. On-Line for Free at Ford. Spark plugs typically need to be replaced every season or 25 hours of use. Possible causes - Vacuum hoses damaged. More than likly a faulty vacume tocontrol sol.
If you have a clear the diagnostic trouble codes from memory, and see if this code returns. Typically, there are 3 wires at the A. I would check your air pump, check all of your air hoses to be sure they aren't cracked or torn, try cleaning the mass air flow sensor, check your purge valve I had a friend that got that code and it ended up being her purge valve. When the pump kicks in, the O2 sensor voltage should go to less than 125mV. Nov 11, 2011 P0411 means there is no flow during test.
I read all the available postings I could find on these two trouble codes. The check valve usually goes bad and allows condensation water from the exhaust to enter the pump, where it freezes in extremely cold weather. Full manifold vacuum should be read on the gauge. During hard acceleration, the air pump is deactivated, preventing backfire from the exhaust. The valve should hold a vacuum. Verify operation of the combination valve.