Question about 2006 Chrysler Pacifica

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Code P 0420

Malfunction indicator light is on, and code P 0420 is shown

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There are numerous things that can cause this code to come up.First how many miles do u have? U have to make sure there are no exhaust leaks by the down stream O2 sensor. Also have to make sure there are no fuel delivery problems or vacum leaks. If u have access to a scanner for your vehicle u will have to look at your fuel trims and make sure they are around 0% at idle and off idle. Also have to make sure your O2 sensors are working correctly. Post some more info for your vehicle and i can guide u in the right direction

Posted on Jan 10, 2013

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How do I fix this problem?


the p 0420 is the HO2S bank 1 or cat converter below efficiency threshold
replace the HO2S first as it is the cheapest then replace the cat converter bank 1
have the accredited auto electrician bench test the alternator and regulator for over voltage

Nov 13, 2015 | 2001 Chrysler PT Cruiser

1 Answer

A/C and Heater, Drivers side airbag light


For bower fan check:
- Speed controller assembly of blower fan.
- Wiring harness and fuse
- Blower fan.
To solve the air bag light problem retrieve the SRS error codes with the help of diagnostic computer and follow the description.
You can also check the error codes manually as described below.

cedd3ab6-1868-4077-a1e0-5a91b74080b0.jpg
Procedure:
Read the blinking patterns of the DTCs. As examples, the blinking patterns for the normal system code and DTCs 11 and 31 are shown in the following diagram. The first blinking pattern indicates the first digit DTC. The second blinking pattern occurs after a 1.5-second pause. If there are two or more DTCs, there is a 2.5- second pause between each DTC. After all DTCs are shown, there is a 4.0-second pause, and they are all repeated.
HINT:
• If 2 or more malfunctions are found, the indication begins with the lowest numbered DTC.

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Feb 26, 2014 | 2006 Toyota Matrix

1 Answer

Hi, my neon 2004, have the code: 0128,0551, 0420, 0622, 0517, 0563. I wanted to mention that it does not have catalyst, what could these codes mean?


A real smorgasbord!
0420 is for the cat, so scrub that one. I could not find 0517-don't know what that means. 0551 and 0128 are sensor malfunctions, or circuit malfunctions for those two sensors (P/S pressure switch, and Coolant temp. sensor). Before going after that, take heed of 0622 and 0563: 0563 is system voltage too high, 0622 is generator field "F" control circuit malfunction. You have a bad voltage regulator in your alternator-putting out too much current. Try a different alternator-it may clear up the sensor malfunctrions, too.

Nov 30, 2012 | Cars & Trucks

1 Answer

What should i do if i get a 0420 code on a 2003 ford taurus


Trouble code P0420 means: Catalyst System Efficiency Below Threshold

This is unrelated to the noise when turning sharply or the grinding when braking/brake light.

Feb 27, 2012 | 1993 Ford Taurus

1 Answer

Servise engine soon code po325 or po420


P 0325 - Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
P 0420 - Catalyst System Efficiency Below Threshold (Bank 1)

Dec 26, 2010 | 1998 Nissan Pathfinder

1 Answer

There's a lit up symbol that has just shown up by the blinker lights on the dashboard. I just had my transmission fluid changed, do you know what it could be? The picture looks like an engine


This is your MIL, or 'Malfunction Indicator Lamp'. It is more commonly know as a 'Check Engine Light'. When this light comes on, there has been a fault somewhere in the system, which will cause a code to be stored in the ECU, or 'Engine Control Unit'. A scan tool needs to be connected to your vehicle to read this code. The code will allow you or your mechanic to further diagnose the problem.

Hope this helps!

Jun 23, 2010 | 2000 Dodge Caravan

1 Answer

Code p0420


Hello.

Normally, the P-0420 indicates a sensor issue; a cat replacement would be needed if you had the P-0420 coupled WITH a
P-0430 code.

What I would do, if I were you, would take the car to a shop that can perform an "induction cleaning", and have that service done. Then, replace the spark plugs, if the car is around 90,000 miles. You may alsop need a front air-fuel sensor (the one on the manifold) replacement.

I would not change the cat until I did the above services. It does not sound like a bad cat just yet.

Dec 30, 2009 | 2004 Toyota Corolla

2 Answers

Malfunction Indicator Lamp


Take your car to your local autoparts store and have them pull the codes - this is free at most stores. Post the codes when you're done. This can be caused by anything - even as simple as not tightening your gas cap (you should hear the clicks - it doesn't damage the cap).

Aug 07, 2009 | 2007 Toyota Yaris

1 Answer

Tranmission indicator reads E not D for drive


E = Error.

Electronic Transmission Error Indicator
The vehicle is equipped with a redundant electronic gearshift indicator. This character appears with the key in the RUN position and displays the same gear selection as shown on the selector lever floor console next to the range selector lever. If an "E" character flashes or remains on this indicates that a transmission malfunction has occurred.
----------------------------------------------------------------------------------
Go to Autozone and ask them to perform free computer scan to see if any trans codes show up. May be just a fluke.

May 31, 2009 | 2001 Lincoln LS

2 Answers

Check Engine Light


Hello engelhard58
I have attached a link that can give you some of the reasons why your getting that code.I hope you able to get your answer out of that.
Mean of the code=P0420 Catalyst System Efficiency Below Threshold.
Link to site

Dec 12, 2008 | 2005 Subaru Forester

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