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Error Code Jeep Po420

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I'm on the freeway and 2 minutes before my exit the rpm go down as well as my speed. Best of all it's totally free! Lets Find Out . - Dauer: 5:06 The Random Mechanic 132.795 Aufrufe 5:06 How to Fix a p0420 Catalyst System Efficiency Below Threshold Bank 1 - Dauer: 4:55 ACE AUTOS UK If the code is not addressed in a timely manner, and the catalytic converter could be seriously damaged.

Inspect the downstream heated oxygen sensor (HO2S), replace if necessary Replace the catalytic converter Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply I sautered the wires longer to reach. Im getting about 11 mpg in the city. These components are most commonly the cause of the P0420 trouble code. check my site

Po420 Jeep Liberty

I have read that having an after- market cat converter installed can cause that code to pop up even thought it is running efficiently. Please help before I go well and truly insane... It's only been a couple days, so I don't have any long-term results to report. Some fail because they want to.

If either a slow switching rate or spike/drop-out happens, but the O2 then recovers and appears to be operating normally, the O2 sensor may be starting to deteriorate – or as Views the live data of the downstream (rear) oxygen sensor. The braking system on your car requires a lot of pressure. P0420 Bank 1 From here on, I will try to explain some of the more-general steps I would take when diagnosing a converter with a scan tool.

Service engine soon light came on. Multi treatment for $15 + sh. The MIL lights up whether you have one code or ten! Vacum leaks are unlikely.

The vacuum booster is one of the main sources of this pressure. P0420 Fix I will stay away from any finer points, as there are variances from manufacturer to manufacturer, but using these steps as a guideline should help to properly diagnose a catalytic converter. Jeep Builds Other Vehicles Technical Write-Up/How To Section Aftermarket electrical systems General Introductions Cherokee Chat Cherokee of the Month Off-Topic Discussion Wheeling Neighborhoods Pacific Northwest Pacific Southwest Northern Rockies Four Corners Most cats fail due to misfires or rich conditions.

P0420 Code Jeep

We strongly recommend that if you need to replace the catalytic converter that you replace it with an OEM unit.

If they are present, again further engine repairs may be needed before replacement of the converter. Po420 Jeep Liberty See also: P0420.com - P0420 Help Register now to ask a question (free) Related P0420 DTC DiscussionsP0420 2012 Ford focus flex fuel engineHello, Can anyone help me. P0420 Code Jeep Wrangler Can anyone tell me what I should replace 1st ? #40 - Michael - 05/22/2010 - 19:51 P0420 code fixed I'm the one with the Toyota Corrola and it is now

Be careful!! Read more Related questions Q: Difficulty accelerating during cold start Hey there. The downstream oxygen sensor voltage reading should be steady. guys, here is the thing, this code is for your CAT OR PRECAT(if applicable) OR BOTH. Jeep Code P0455

No leaks in the exhaust ...05 Nissan Frontier P0420 catalyst sys efficiency threshold(bank 1)Hi put dual exhaust on my Nissan Frontier 05 SE 2 years ago and ever since I put I'm at my wits end here. I just wanted to give everyone a heads up! Many manufacturers give a five year, unlimited mileage warranty on these items.

I drove my car to my friends, who lives 20mins away (mainly on freeway) with no signs or symptoms. P0430 Code Does that really mean your converter has reached the end of the road and needs to be replaced? If the front catalytic converter upstream oxygen sensor wave form is switching from high to low (rich to lean) and the rear catalytic converter downstream oxygen sensor is close to a

Then I was told it was the sensors, so with 140K miles, I changed them both... "NO HELP".

More related articles How Long Does a Vacuum Brake Booster Check Valve Last? Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light) P0420 Jeep Description The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 converter? #2 - Tessa - 05/21/2009 - 11:07 2002 saturn p0420 code changed o2 sensor ,cool temp sensor,engine light is still on. P0420 Toyota The same thing can happen if the engine has a bad exhaust valve that leaks compression into the exhaust (check compression).

Ill fix and let all know. Will I Need to Replace a Recently Installed Converter? So, to really simply things let's just say that the efficiency of the catalytic converter and/or exhaust pipe and/or O2 sensor is not so great. The downstream oxygen sensor is located behind the catalytic converter.

Sprache: Deutsch Herkunft der Inhalte: Deutschland Eingeschränkter Modus: Aus Verlauf Hilfe Wird geladen... I recently put one of those STP fuel injector cleaners in my last full tank of gas. While I have your attention, don't forget to do oil changes as the owner's manual schedules and keep those tires inflated to the proper PSI. Uses an OBD-II scanner to retrieve trouble codes stored by the Power Control Module (PCM).

Large vacuum leak 4. No luck. In short: take the P0420 code seriously and give due dilligence to figuring why it has been logged. AN AFTER MARKET IS WARRANTY FOR 5 YEARS OR 60000 MILES..tHE CHECK ENGUINE LIGHT IS BACK ON P0420 CODE AGAIN..ANY SUGGESTION.

One day later CEL came back on with p0420. The first thing a technician would do is to check the code to get a better idea... I first look for any impact marks on the converter (see Figure 4) that may have resulted from road damage. Thanks Please enable JavaScript to view the AutoCodes.com Powered by Disqus.

Need Help Now? Modified Cherokee Tech Comanche Tech KL Cherokee Tech Grand Cherokee Tech Fabrication builds section. Thank you for your time and posting this site! Does that make the code more specific for my engine? #6 - Aaron - 06/27/2009 - 15:18 downstream 02 sensor and cat my knowlege about downstream o2 sensor is that it

Consequently, if the Check Engine light is on and you have a P0420 code (or any other code), you will FAIL the test -- unless the state allows you to take It's been 2 months and no CEL. the cat.