Need Help?

2012 Volkswagen Jetta Sedan Base 4dr Auto

2012 Volkswagen Jetta Sedan
Trim Info:
Front Wheel Drive, 4 Door Sedan, Compact Cars
23 (2011) mpg city / 29 (2011) mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
 Miles
Enter current mileage for most
accurate info about this vehicle


Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.

back to question list

Ask Our Mechanics

Ask The Community


June 24, 2013, 7:59 pm

Sarah W
 

Question: '02 VW Jetta Error Code P0420

My check engine light first came on about 3 years ago and my mechanic said that the catalytic converter efficiency is below factory threshold standards (P0420), but is still operating at normal efficiency. I have passed smog with this error code (check engine light was off bc battery died and by some miracle it stayed off for the duration of smog check).

Could this really be the catalytic converter or is there a chance that it's a faulty oxygen sensor?


 
 



My Auto Score

See the free AutoCheck score

Ask a Certified Mechanic
Need car repair help? Ask a question to an auto mechanic for free.

Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…