Matching You with a Pre-Screened Smog Check Center You will Love
Free Online Smog Check Diagnosis
$500 Free Consumer Repair Assistance
Failed Emissions Test
How to Pass the Test
Who Else Wants To Pass the Smog Check
Miles: 
Which Type Should I Choose?
 
   
    Forum > Emissions Component > Question

Join the community and post your questions. Ask-A-Tech right now!
 
 



Emissions Component
 

Plymouth Neon Highline Trouble Code P0240 CAT Efficiency Below Threshold

I have a 2001 Plymouth Neon that failed the smog check because of trouble code P0240 Catalytic Converter Efficiency Below Threshold. I replaced both oxygen sensors, the front and back, without any luck. The smog station I took it to told me the CAT is bad. It has a Catalytic Converter on the manifold and another one after that. One shop says a universal CAT will work for out-of-state emissions. Another shop says it won't and the check engine light will stay on.

I need to get a straight answer on this. So will a universal CAT work, or does the computer need to see a OEM catalytic converter. Thank you for your time.


Answer:  

A universal cataltyotc conveter might work to turn off your Plymouth Neon's check engine light... in otherwords it will get your Neon to emit cleaner exhaust, however it will not pass the California smog check if the CAT is not California approved; it will cause a "tamper" failure. With that said, you must replace with an OEM component.

The correct CAT will have an executive order (EO) number stamped on it indicating it is legal for California sale and use. As of January 1, 2009 it is no longer legal to import or sell 49-state emission legal catalytic converters in California; and that's why you will not find any online retailers shipping to CA.

The allowed option is to replace your Plymouth Neon's catalytic converter with an inexpensive (compared to dealer item) OEM CAT which is California approved and has been given an Executive Order number.


posted by SmogTips Support 02-06-2014 12:16 PM
 


Related questions and answers you might find useful:

Mini Cooper DMV Registration Due in 5 Day Won't Pass Smog by anne on 10-06-2021 02:32 PM

2001 Jeep Grand Cherokee Laredo with K&N Air Filter by David on 09-30-2021 11:34 AM

1995 BMW M3 Gross Polluter High HC & NO @ 15MPH by Jared on 09-27-2021 08:56 AM

Missing Emission Sticker Caused Smog Check Failure? by Michael on 09-24-2021 04:05 AM

Do PCV Hoses Have To Be CARB Certified? by Kevin on 09-23-2021 11:41 AM