Catalytic converter obd2

PackCon , May 17, Kuntrykid and ChadsPride like this. Changed the plugs at 62k Not too bad, took about an hour. I assume they had never been changed before even though the dealer told me all the 30k maintenance was done when I purchased the truck with 31k. Pulled densos and ngks top 3 from dpassenger side, bottom 3 from driver side Truck is running smoother and looks like I may be getting better gas mileage, will confirm when I empty this tank. Sure is quiet in here today.

ManBeast , Jack , 1mike and 3 others like this. Drove it to the dialysis clinic. SC2SC , Justanotherhemi , gabbo and 10 others like this.

Ironium , May 17, Karate , Theloraxcross , Justanotherhemi and 16 others like this. Show Ignored Content. Smittybilt 5. Vibrant 2. Load Capacity.

Unfortunately, there is no current emission sensor technology available that can be installed on a vehicle to monitor tailpipe pollutant levels. Instead, vehicle manufacturers use an oxygen sensor to indirectly estimate whether or not a catalytic converter is functioning properly. Since emission levels are estimated rather than being measured directly, it is theoretically possible to produce a catalytic converter which meets emission standards yet also shows a "check engine" light on the instrument panel.

Therefore, government policy needs to ensure that aftermarket catalytic converters are compatible with the vehicle's OBDII system, in addition to meeting emission requirements. However, they have taken two different approaches to the problem.

Obviously, this is a relatively complicated set of parameters for a repair technician to consider when trying to decide which converter to install on a vehicle. Make Your Vehicle More Efficient Your catalytic converter is an essential part of your emission and exhaust system.

Since we were established in in Escondido, it has been our mission to provide quality work at fair prices in a timely manner. Our owner, Brick, and his son, Zach, is committed to your satisfaction. Expect nothing but the best from our dependable team. Bring your car to our facility for a FREE, instant estimate.

Call us today to learn more. To work efficiently, a converter needs to capture and hold oxygen when the mixture is lean so it can burn the pollutants when the mixture is rich. A special "washcoat" of aluminum oxide on the honeycomb increases its surface area by a factor of almost 7, times, allowing it to trap and hold the extra oxygen.

But if the washcoat has been damaged or contaminated, the converter may not be able to trap enough oxygen causing a drop in efficiency. It's supposed to run on every "trip, which is a drive cycle that begins with a cold start and continues until the engine reaches normal operating temperature. But the monitor monitor won't run until all the "enabling criteria" are met. As a rule, the vehicle will have to be driven at highway cruising speeds for at least 15 minutes to get the catalyst monitor to run.

The catalyst monitor will not run if the OBD II system has detected a conflict with other tests such as the EGR, fuel system or purge tests , or there are hard codes or pending codes for a misfire condition or oxygen sensor. If the test runs and the OBD II system detects too much of a drop off in converter efficiency, it will set a pending code.

If the same condition is noted on a second or third trip, the code will mature and turn on the MIL lamp. If you plug a scan tool or code reader into the vehicle and discover a generic OBD II code P to P, you've diagnosed a converter problem. Now the question becomes, is the converter really bad?

That's a question that isn't so easily answered. The only way to know for sure is to give it an emissions test. But here's the catch. Even if it passes a tailpipe test, it may not be emissions legal as long as the MIL lamp remains lit. The only way to extinguish the MIL lamp may be to replace the converter. Remember, the OBD II system is calibrated to detect potential emissions problems that may cause emissions to exceed federal limits by 1.

Some vehicle manufacturers are more cautious than others and may calibrate their OBD II systems to turn on the MIL lamp at the first indication of trouble -- even though actual emissions may still be within legal limits.

Even so, if the MIL lamp is on and there's a converter code it means the converter is failing. Sooner or later converter efficiency will drop to the point where it may cause a real emissions problem.