Failed Smog Test

Insert popcorn emoji.

 

Sound like its just a sending unit problem? If it just needs replaced, you do it yourself and id assume parts are pretty cheap

 

Was it actually tested to see if it was out of spec or did they just fail it because the light was on? False codes happen all the time without performance issues.

 

So it failed because the code was there but what did the actual stack tester say? Phantom codes mean nothing. They happen all the time. Diamler/ Chrysler’s ecm and tipm’s are known for this.

 

Don’t try to pass any test when any Check engine light is on. And if you clear it, the truck has to be driven certain amount of miles before the computer reads all is clear and functioning normally. Now for that code, take it to a reputable shop and have them analyze it, fix it. Like mentioned above, if you can replace and fix the “Correct” sensor, go for it. But the truck has to be driven (don’t know exact mileage) for the computer to reset to read all sensors are working properly.

 

Fix the issue for starters, then the code should be cleared. Sometimes the code clears itself once the problem gets fixed. But I recommend to have it cleared. Then it has to be driven for certain amount of miles for the computer to read all systems. Sometimes you can get a ghost code. I’ve had them before and cleared them and never came back. It’s a hit and miss issue with these systems.

 

Usually the first sensors to go out are the inlet and/or outlet sensors, and those are the most expensive ones, mine cost me $6-$700 each. That was in 2021. I bought OEM.