Q: Fixing catalytic converter low threshold issue

asked by on

How to fix catalytic converter low threshold issue?

I fix that every week on people’s cars because they have got to get their cars inspected and they get that stupid code "catalytic converter below efficiency threshold."

There are so many things that can do it, but I’ve had fantastic luck by putting a very good cleaner in the gas tank and then driving it around. There are certain ones out there like Cataclean and different brands.

I have had good luck using lacquer thinner. I go to an automotive paint store and buy a gallon of lacquer thinner and mix it with at least nine gallons of gasoline and drive it around. I just did that with a guy’s car that failed in emissions and I said "you drive it." He came back the next day and I plugged my computer and put a test and got it fixed. Pray that will fix it, because if it doesn’t, it is very expensive. You don’t just want to get out and guess with the new catalytic converter, because if the catalytic converter goes bad, normally, it’s because something made it go bad and if you are replacing it with a new one might not fix the problem.

If you are sure the catalytic converter is the problem, you’d better find a mechanic to replace the catalytic converter for you. Otherwise, I would have a comprehensive inspection done on the car to ensure that you are replacing the right part.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Fixing catalytic converter low threshold issue

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Loss of power esp on hills

This may be a sign of a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When this is clogged, this...

Q: Q: how many Catalytic converters are on my car?

Claimed by Jeff Engstrom

Q: Engine light is on, suspect catalytic converter

If your catalytic converter was having an issue as diagnosed by the dealership and it has been modified to correct the issue with no success, I would start by recommending a replacement of the catalytic converter. It would also be...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...