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How many miles do I have to drive to get my catalytic converter to self test?

Had check engine light code P601 Bad PCM. Had PCM (or ECM as some call it) replaced. Was told to drive it for 3-4 days to let computer diagnose itself before getting emission test. Drove it 250 combined highway and city driving. Failed emmision test. Catalytic converter Notcompleted and Evap. System Notcompleted. Found out that the tank needs to be 15-85% full for Evap to test itself. Filled it for the emission test but had let it run low during the 250 miles. How much longer do I need to keep driving it to get those two systems to self test? No more codes have popped up. Mechanic says to just keep driving it. Have to get this done. Already two months overdue on tags and the tickets are stacking up.

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  • Cars & Trucks Master
  • 22,184 Answers

The Cat is probably faulty.

Posted on Mar 28, 2017

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: My check engine light is

Bank 1 is the converter on the side that engine cylinder one is on. Yes that is true about the converter, the computer is programmed for a certain value, an aftermarket cat will not meet that value and the check engine lite will be triggered.

Posted on Sep 09, 2008

  • 1861 Answers

SOURCE: 2003 toyota camry

P0420 is a cat code. Sometimes, you can replace the upstream & downstream air/fuel & O2 sensors, run some good fuel injection cleaner thru it, and that might fix the problem. If not, you may need to replace the cat. Note that the cat is covered under warranty for 8 yrs/80,000 miles. Toyota will replace it if it has gone bad, for free.

Posted on Sep 16, 2008

zolo6321
  • 7 Answers

SOURCE: 99 Isuzu Rodeo 3.2L 2wd Catalytic Converter instructions

you're having the same problem i had with my 99 isuzu rodeo 2 wd 3.2 i paid a muffler guy over $600 to replace those catalytic converters, if you're good at welding you could do the welding yourself after buying the catalytics, basiclly i seen them just cut them off and welded them back on

Posted on Dec 31, 2008

landsend
  • 1066 Answers

SOURCE: engine light keeps coming on, had catalytic converter replaced 2x

a bad or disconnected oxygen sensor will make the engine run rich.
How about a clogged air filter? 

Posted on Mar 27, 2009

localwonder
  • 6784 Answers

SOURCE: catalytic converter

HI, this guide will help you with this replacement.

Step1 Lift your jeep. Unfortunately, the catalytic convertermag-glass_10x10.gif sits about midway down the length of your jeep, so lifting one end or the other will not do. Ramps are your best bet to get you within reach of the parts when working from home. Luckily, this is usually the hardest part of this repair. Step2 Be patient with the bolts, as they are often hard to remove due to size and awkward placement. You may have to drill or saw bolts to remove them. With this in mind, you should pick up new bolts, nuts and seals for your replacement project. Step3 Buy a catalytic converter specific to your jeep to avoid extra work. A generic part must be welded into the jeep, while a vehicle-specific model comes pre-welded to the proper pipes for easy bolt-on installation. Step4 Remove the 02 sensor (with an O2 wrench) before unbolting the catalytic converter. Then, you should remove the pipe connecting the sensor to the converter. Depending on your exhaust system, you may have to remove more pipes before you unbolt the converter from the muffler. Step5 Replace the old catalytic converter with a new one. This should be the easy part, as you simply bolt the new part in place. Step6 Reattach the exhaust pipesmag-glass_10x10.gif and 02 sensor, and the basic job is done. Make sure you replace any cracked or rusty pipes while you have the exhaust system apart.

  • Catalytic converters often fall under a separate emissions warranty that lasts at least 7 years and 160,000 miles. Even if your car is out of its regular warranty, but it is a newer model, ask your dealer to replace the part for you free of charge.
  • Rent the O2 wrench or socket if you do not own one. Most auto parts stores carry this tool for rentals.
  • In many states, older (vintage) cars do not need a catalytic converter, so you can gut it or remove it completely. No damage will result from running a car without a converter.
  • Due to emissions standards, it is illegal to buy or install used converters.
Please rate and god bless:)

Posted on Apr 20, 2009

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My check engine light came on and I took the car to the auto parts store and they diagnosed it as the catalytic converter. I stopped driving it for a few months took. Then I took the car for an...


What was the exact code? The O2 sensor after the Catalytic Converter, or Rear O2 Sensor, could be faulty which would cause the computer to think the Catalytic Converter is not working efficiently. The code can be reset at the auto parts store with the same code reader they used the first time. P0420 is the most commonly thrown OBDII code pertaining to catalytic converter efficiency below threshold. I would replace the O2 sensor after the Catalytic Converter and reset the computer to see if the code comes back. If it comes back you may have a bad catalytic converter, exhaust leak, damaged exhaust pipes, damaged O2 sensor wiring/connectors, plugged catalytic converter, etc.

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Check Engine light code P0432


P0432 - Main Catalyst Efficiency Below Threshold Bank 2
The ECM or PCM monitors the front an rear O2 sensors. The ECM or PCM detects Warm up Catalytic Converter when the sensors are out of specifications.

DTC is set when the ECM or PCM detects rear HO2S value difference becomes closer to value of front HO2S. The ECM or PCM monitors when vehicle speed is 25-60 MPH, load is 22-45 percent and engine speed is 1000-3000 RPM.

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Possible causes
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Possible solution
- Replaced Catalytic Converter - Replaced rear O2 sensor - Repair wire harness or connectors

Check it ans tell us news.

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Thank you for using fixya and good luck.

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