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2004 Chrysler Pacifica. Engine code is P420. Is this the oxygen sensor or egr valve?

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HI, the PO420 is an oxygen sensor code.

Posted on Aug 27, 2010

Testimonial: "Thanks, I had thought it may have been my gas cap. Light came on right after gassing up."

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Hi 2004 Chrysler Pacifica p2066 p0404 Also it drain the battery when not in use


P2066 relates to a fuel sensor level:
chrysler error code p2066 Google Search

P0404 relates to an EGR fault (Exhaust gas Recycler). You may be able to clean the EGR:
chrysler error code p2066 Google Search

Whether this is causing your battery to drain isn't clear - there are other causes of batteries discharging, such as burnt out diodes in the alternator.

Treat it as 3 faults - try and rectify the 2 error codes first (disconnect the car battery whe not in use to prevent it draining) .. and then look at the cause of the battery discharge

Mar 11, 2017 | 2004 Chrysler Pacifica

1 Answer

How do I change egr valve on a 2005 chrysler pacifica ?


If car does not stay runnin or stalls wen slowin down is egr effects. It may be the gasket wher it connects to engine. Sonetimes u can blow out carbon in the valve itself. Seek a shopmanual at local library

Jul 27, 2015 | 2005 Chrysler Pacifica

1 Answer

How to replace a EGR valve on a 2004 pacifica 3.5


The EGR is on the drivers side of the engine near the firewall side next to the exhaust pipe it has a wire to disconnect then take out the two bolts that hold the tube to the valve now remove the two bolts that hold valve to engine put back in reverse order

Sep 17, 2014 | 2004 Chrysler Pacifica

1 Answer

Egr valve was change and the check engine light keep coming on p0404


could be carbon buildup or a bad EGR valve. Did you disconnect the battery to let the computer learn the new part? However that doesn't rule out these an open or short in the 5 Volt reference circuit Open or short in the ground circuit Open or short circuit in the PCM controlled voltage circuit or a bad pcm or you got a defective egr valve

Jun 04, 2014 | 2004 Chrysler Pacifica

1 Answer

Engine codes 0403 and 0032 on 2004 crysler pacifica


P0403 ITS A EGR VALVE PROBLEM AND P0032 IS A 02 SENSOR PROBLEM LET ME KNOW HOW I CAN HELP

Dec 05, 2012 | 2004 Chrysler Pacifica

1 Answer

2004 chrysler pacifica 3.5l this code came up on my scanner and i was wondering if some one could help me if it is the valve, solenoid stuck.. Symptoms are rough idle some times my car dies but it has


Trouble Code: P0403

EGR Solenoid Circuit

Possible Causes:


EGR solenoid ground circuit is open.EGR solenoid control circuit is open or shorted to ground or to voltage.EGR solenoid power circuit is open.EGR solenoid is damaged or has failed.http://www.autozone.com/autozone/parts/Duralast-EGR-Valve/2004-Chrysler-Pacifica-2WD/_/N-jlfixZ93xpy?itemIdentifier=857100_0_0_PCM has failed.HERE IS THE EGR VALVE.CLICK ON LINK TO VIEW.

Oct 21, 2012 | Cars & Trucks

1 Answer

2004 Chrysler Pacifica check engine light came on. Ran codes. Replaced erg valve and oxygen sensor. Can't clear codes and nothing new comes up


Clear codes by hooking up a scanner, and go through the "clear codes" sequence. It will erase all stored codes. If it doesn't, you have a problem with the ECM/PCM (engine computer), or the data link connector.

May 08, 2012 | 2004 Chrysler Pacifica

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2004 Chrysler Pacifica. Sometimes when stopping the engine dies. I have to put the vehicle is start and restart. Then the check engine light comes on. Help!!!!


you most likely have a p0404 dtc for egr valve if you go to autozone they will scan it for free if this is the case then replace the egr valve what happens is it sticks open causing an internal vacuum leak stalling out the engine.

Dec 16, 2010 | 2004 Chrysler Pacifica

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By winodj_d on Nov 23, 2010 the analyze of the car gifs still a p420 error. After replacing the lambda sensors (oxy sensors) and the katalysator. on a chrysler pacifica 2005 fault has been...


CODE PO420 - CATALYTIC EFFICIENCY BELOW NORMAL BANK I POSSIBLE CAUSES - BASE ENGINE PROBLEMS HIGH COOLANT OR ENGINE OIL CONSUMPTION- CATALYTIC CONVERTER DAMAGED OR HAS FAILED - AIR LEAKS IN AT THE EXHAUST MANIFOLD OR EXHAUST PIPES -YOU NEED A CODE SCANNER TO ERASE CODE.

Nov 25, 2010 | Chrysler Pacifica Cars & Trucks

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