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Pacifica 2005 all wheel drive stuck in limp mode. codes p0420 catalyst effeciency below now normal. p0404 erg valve

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: ( Dealer has the tools to properly diagnose these combinations of problems. Concern for the catalytic converter damage when operating under non normal closed loop operation.

The OBDII will try to protect the engine and driver by reverting to the limp home mode. Driving extended distance not recommended.

Dealer specific Chrysler analysis tools can pin point the problem allowing for problem resolution.


Hope this helps?

Posted on Dec 28, 2016

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Posted on Jan 02, 2017

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2 Answers

What means catalyst Efficiency below normal


      Got it scanned and it's P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8, 2011

      civic - Check Engine code P0420 Catalyst efficiency below ...

      mechanics.stackexchange.com/.../check-engine-code-p0420-catalyst-efficie...
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    P0420 Error Code: Catalyst System Efficiency Below ...

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    P0420 OBD-II Trouble Code. Technical Description. Catalyst System Efficiency Below Threshold (Bank 1). What does that mean? This diagnostic trouble code ...

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Jan 26, 2016 | Cars & Trucks

1 Answer

Why does my van keep going onto limp mode '


it could be as simple as the EGR valve stuck open

Feb 06, 2015 | Chrysler Cars & Trucks

2 Answers

P0420 p0522 chrysler pacifica CODES


thje po420 need to monitor o2 sensors to verify if you have a bad sensor or bad catalitic converter
the po522 oil presure sending unit

Oct 15, 2014 | 2005 Chrysler Pacifica

1 Answer

How to fix p0404 and p0420


code p0404 refers to exhaust gas recirculation (EGR) valve position--range/performance problem ===causes --hose leakage/blockage--wiring ---EGR valve/solenoid
code p0420 refers to cat converter system bank 1-efficiency below threshold===causes --cat converter---wiring---HO2S 2

May 31, 2014 | 2007 Dodge Grand Caravan SXT Minivan

1 Answer

I have a 2002 Dodge Caravan with the code p0420, i know it has something to do with the catalyst but i dont not what is it exactly, how do a find out and fix it?


It (the code) is a Generic code. P0420: is a Catalyst system (not always the "cat" itself) code basically saying it is working below effecient levels. A pin hole in in vacuum tubes that recirculate exhaust gases could set this. Check for a bad "oxygen sensor", especially if the vehicle is still perfoming well. If the catalytic converter were clogged, it would lose performance rapidly.

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1 Answer

Fault codes p0420 and p1404 on 1998 pontiac grand prix - solution


the po420 is catalyst system efficiency below threshold (bank 1)

the p1404 is a mfg specific code. egr valve stuck open or circuit performance

if this car is mostly city driving you might be able to clean up the egr valve and it might clear up the codes

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2 Answers

Engine light came on. The dealership said it was diagnostic code P0420 and that it would cost @ $1,200.00 to repair. This seem pretty high. What is this diagnostic code about and is the repair rate


Hi, this code represents a Catalyst System Efficiency Below Threshold (Bank 1). and the repair, considering that it will be repaired by the dealership, seems to be in the normal cost range. The labor is what usually inflates the price when dealing with catalytic replacements.

You could probably get a better deal by taking it to a non dealership type of repair shop. This may cut at least 200 dollars of the original dealership quote.

Please rate and god bless:)

Apr 14, 2009 | 2005 Subaru Outback

1 Answer

2005 grand caravan-erg valve needs to be replace


had same problem 2005 Grand Caravan clean electrical connection to egr valve before replacing valve corrosion causes a low voltage to valve shows OBDII code P0404

Jan 13, 2009 | 2005 Dodge Caravan

1 Answer

I have a 1996 Lexus LX450, engine light came on. The DTC is P0420


With that code you most likely have to replace the catalytic converter.You can try to reset the light but it will come back in time.

Nov 14, 2008 | 1996 Lexus LX 450

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