There are approximately 64 high resolution pulses for every cam pulse. How serious is the P0411 code? Look for burn spots or melted plastic. P0411 is directly tied with an emissions control system. This system tests the fuel system to make sure it is not leaking fuel vapors into the air. Next, see if there are any other diagnostic fault codes. The pump should put out a strong, forceful amount of air approximately5 psi. Common mistakes when diagnosing the P0411 code The most common mistake is made when unneccessary components are replaced within the air injection system - usually when parts are just clogged but have not actually failed.
In many cases, the driver will not notice anything out of ordinary with P0411 with the exception of the Check Engine Light being present. The secondary air injection system uses ambient air, which is pumped into the engine exhaust, to reduce emissions. Mistakes can also be made when steps are not followed in the proper order or just skipped entirely. The also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Now with 163k miles I have trouble codes P0401 and P0411.
How does a mechanic diagnose the P0411 code? Location pic in a 5. The check valve usually goes bad and allows condensation water from the exhaust to enter the pump, where it freezes in extremely cold weather. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. I had these codes on my 96 as well. This should activate the pump. Equal amounts of air should be felt from all spark plug holes.
Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. Thus, to test, one needs a data streaming tool during a cold startup. If both are present, then use a jumper to the battery feed to Air pump the feed circuit through a fused jumper. This test monitors the number of high resolution pulses which have been missed not detected. Spark plugs typically need to be replaced every season or 25 hours of use. I removed my hood and used two small kitchen type ladders with a plank across to work on all that Secondary Air Injection stuff. Some models require multiple ignition cycles or drive cycles for a malfunction indicator lamp to be illuminated but a code should be stored on the initial failure.
This is an actuator test. If a is not available that has a data stream, then see if code P2432 A. The list of automotive Makes at the right edge of the screen. Visually inspect Air Pump for broken or loose Air Pump Belt. That is a lot to digest. P0411 Secondary Air Injection System Incorrect Flow Detected p0411 is a generic code, probably a vacume leak,vacume hose broken check this first, check the air pump turn on the car but it needs to be cold, you should hear a high pitched whine, this is the air pump running,there are 2 hoses one suction one blowing thishose should be going from the air pump to the air cleaner disconnect that and see what the volume is should be pretty strong. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.
What are the common causes of code P0411? In these cases, the parts most likely just need to be cleaned. Remove power and ground to the solenoid. If not, then check for forward and ground present at the Air pump jumpered. When is the code detected? A professional level scan tool is needed to properly diagnose the secondary air injection system. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot.
P0411 Description An air pump is used on the vehicle to lower tail pipe emissions on start-up. It should now read close to zero volts. If these codes are present, diagnose them before attempting to diagnose the P0411. On-Line for Free at Ford. When she got home I took my new scan tool out and plugged it in, it's not a nice snap on but this thing is pretty cool for a cheapie. I would really like to send him a fruit basket or other token of my appreciation.
Symptoms Symptoms may include abnormal noises from the secondary air injection system, engine hesitation upon acceleration, the engine may stall at startup or idle, a stored code, and eventually an illuminated malfunction indicator lamp. Vehicle Application: 1998 Audi A4 Quattro 2. The sensor is usually part of the Secondary Air Check Valve. Enter the 5 character trouble codes in the search box and submit the search. 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? Turn the engine over by hand. Technicians use this information to test the air injection system and determine which part is not functioning as designed. I read all the available postings I could find on these two trouble codes.
System Pressure Sensor Circuit Low Input is now set after more than 15 seconds. With the V101 pump and the N112 solenoid active, pressurized air and manifold vacuum are passed to the combination valve on the head. Secondary Air Injection pump motor. Electrical wiring and connectors are also subject to being burnt by high temperature engine exhaust. During hard acceleration, the air pump is deactivated, preventing backfire from the exhaust.
Plug the new relay into the socket for the A. Visually inspect for proper vacuum line routing. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. The information contained on this site is presented for informational purposes only. The system pulls a vacuum on the fuel system and holds it for a period of time.