I failed emissions test because system monitors are not ready. What might cause a "not ready" reading during emissions testing
SOURCE: code p0460
Code p0460 is a fuel level sending unit problem. It will not make you fail an emisions test. The fuel sender is the problem. Your guage is irratic at times. you need a fuel sender replaced in tank.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/terry_db4da071b7da3ac1
SOURCE: EMISSIONS PROBLEM
The most likely cause of this is a faulty exhuast recirculation system.It is used to cool the combustion process preventing the formation of nitrous oxide emissions. The main building block of acidic rain.Use your emission diagram and locate the EGR valve.You will need specialized equipment to check it. Other than taking it off and checking for blocked passages from carbon build up there is little you can do yourself.
SOURCE: vehicle failed emissions testing
You need to replace the intake upper plenum gaskets. There is two pieces, a top cover with one big silicone o-ring gasket and a lower half with six smaller silicone o-rings for the individual intake ports. You can buy these as a set, just for this job. Start this job by removing the wiper blades, then release all the screws, (including the ones that support the wiper motor), that hold that big black plastic valence at the back of the engine compartment. Pull that out of the way, you will have to pull the windshield washer hose through it, just disconnect it on the engine side, now you have access to the plenum. It's a pretty easy job now to remove and replace both halves, just a bunch of 8mm screws hold it all together. Take notes or digital pics along the way so you can pop it all back together. My only caution would be; when you have it apart, do not drop anything in the intake port! I always stuff kleenex in these while I'm working in case something slips out of my hands. Also, don't over tighten, it's all plastic. If you don't want to do it yourself, a shop should charge about an hour and a half, plus the codes must be reset and the van driven until all the monitors are ready.
SOURCE: my ford expedition won't pass emissions test.
you need to hook to a scanner to find the system that is not ready to repair it properly, could be simple but ya need to have diagnosed.
SOURCE: will not pass emmission test.
Hello, Your problem can be in the Relays for the PCM. The connector for the Diagnostics gets a signal from the onboard computer. The Relays are in the Powerbox under the hood of your car. If you go to Autozone, Oreillys, or Advance , they will have your part and can show you the location.
They will also test your car with a scanner for free. You just need to switch the Relay. I am at a different computer which does not have my resources for the TSB's, which are the technical service bulletins. There were some Ford products which acted like yours is doing and the problem was in the Relay box. Several of the relays are the same part, so you will need to know which one will help. But since you can easily do this in the parking lot of the autoparts store, there are only a few Relays to check.
What most people do not understand about the Relays is there are several terminals on each. Part of the Relay can work making a diagnosis difficult for the part that does not work generating from the same bad Relay. Your car should not run with a dead Relay on the PCM, but on yours the portion controlling running is working. The portion controlling outside hookups is not.
In short, all the problems like the Catalytic converter, EGR, O2 Sensors, are simply not connecting to the Diagnostic reader plug. I hope you find my solution helpful.
A service technician will
turn off the dashboard "check engine" light after most repairs. This
resets the vehicle's emission system components to "not ready". The
status remains "not ready" until the vehicle's computer has had adequate
time to review the repaired component. This happens after the vehicle
is driven for a period of time established by the manufacturer.
If the vehicle's emissions system status is "not ready" when it is presented at the E-Check station during the initial test cycle,
a tailpipe emissions test may be conducted. If the vehicle is
transferred to another test type, the vehicle must remain on the
different test track until the vehicle passes the emissions test or
receives a waiver. For example, if the vehicle undergoes an OBD II test
and fails, it cannot be downgraded to a tailpipe test on a re-test; the
vehicle must pass the OBD II test.
For initial and subsequent tests, if a dashboard light is on when the vehicle is presented at the E-Check station, the vehicle will fail the test.
How can the vehicle status be made ready?
When a vehicle is driven through its normal drive cycle, the computer reviews the emission control
system and if the vehicle was properly repaired, the system resets itself to ready. A normal drive
cycle includes operation at both cruising speeds and in stop-and-go traffic for up to a couple
weeks. This process should be followed before bringing the vehicle in to be tested.
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