2006 Hyundai Sonata 2.4 .. I drove 3000 miles waiting for the last 2 monitors to "get ready" for emission inspection. Changed the Cat and 02 sensors...(OE parts). Still waiting for the Cat and 02 sensors to get ready having driven another 600 miles. Every mechanic I talk to says I just have to keep driving. There are No pending codes and No check engine liight on. Any suggestions?
There will be a specific drive cycle for your vehicle and in normal driving it can take a really long time to trigger all the monitors.
As an example, here is a description for the drive cycle for my car based on information in the factory service manual. The details for yours will be different. This is just an example of how involved a drive cycle can be. You should be able to get the specifics for your vehicle from a stealership or possibly in a Hyundai-specific enthusiast forum.
4 of the 7 monitors will get ready if you drive a cumulative total of 10 minutes at any speed and if you also stop the car 6 times from any speed greater than 25 mph. These 4 monitors must be run before the next two monitors will run.
You can make two more monitors (EVAP and Heated Oxygen Sensor) run without driving the car. When you get to work or return home (warm engine) let it idle in neutral or park with the ACC system either off or in ECON mode. Depress the accelerator for a second or two and then let the engine idle for 30 seconds. Repeat 3 times. These two monitors must be run before the final monitor can be made to run.
To make the catalytic converter monitor run, drive normally for at least 5 minutes and check that the coolant temp is at least 140° F. Then drive with a steady throttle (no cruise control, ACC either off or in ECON mode, and ideally on a level road) for 4 minutes at a speed between 25 and 56 mph and rpms between 2000 and 3000. It is more important for the throttle to be steady than for the speed or rpms to be steady. It doesn't matter what gear you're in. If you're driving an automatic then this driving cycle is more easily satisfied in 2nd gear at about 34 mph (2500 rpm) or 3rd gear at about 47 mph (2500 rpm). In 4th gear you're too likely either to drop below 2000 rpm or go faster than 56 mph. You will need a stretch of road about 3 miles long that's ideally level and has no traffic.
You have to complete a full drive cycle. The requirements vary by vehicle so I would look yours up.
Try a tank of shell super v power and a can of Chevron techron fuel injector cleaner and drive it hard for 250 MI but it won't reset odds out of the catalytic converter is weak not weak enough to trip a code but two weeks to let it pass
Thank you. I will try the shell gas and chevron fuel injector. The Cat is new though......so it shouldnt be weak you know.