Question about 1999 Chevrolet Silverado 1500

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Codes po404 and po405, what are the pprblems resulting from these codes, what are the fixes?

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These should be auxiliary emmisions codes....shouldnt cause problems...I work for chrysler but codes are basically the same...you need to have an emissions machine hooked to it...It is all
enviornmental components...You could have a vacum leak or something simple..Have you ever done work to the exhaust system ?...could be a short to ground or loose connection in the harness also.Sometimes you can unplug then replug connectors at the component and solve the code problem because wiring will make the PCM think it is bad when it actually isnt..The PCM activates the ground for all components only after identifying the connection is complete...
........Hope this helps.................................Metalpoet........................

Posted on Apr 05, 2011

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Posted on Jan 02, 2017

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Had code po404 so changed the sensor, now code po406 is showing up and car idles extremely high. What is causing this and how to I fix it?


Opp's

OBD Codes have nothing to do with changing parts

Codes are Parameters that are out of range

You check for codes & use them to diagnose the
system that set them & component test to find a problem

So--- Google your codes & read up

TYPE: OBD PO404
OBD PO406

Your going to need a shop to find the issue

Nov 05, 2014 | 1999 Chrysler LHS

1 Answer

Code po405


You don't let other people work on your vehicles
You seldom if ever wash todays all electronic vehicles
If you do, you spot clean yourself & blow out all electrical
connectors with an air hose if you have issues
Your 300 codes is water down into the valve cover spark plug wells
The 405 is the EGR Valve issue,it failed or they ruined it
Google the codes

Jun 29, 2013 | Ford Cars & Trucks

1 Answer

How do i fix code p0403 p0405 and p0134 on 2000 pontiac granprix 3.1 lot v6


CODE PO134 - HO2S 11 BANK 1 SENSOR 1 INSUFFICIENT ACTIVITY CONDITIONS. CODE PO403 - EGR SOLENOID CONTROL CIRCUIT MALFUNCTION. CODE PO405 - EGR POSITION SENSOR CIRCUIT LOW INPUT CONDITIONS. PROBLEM COULD BE THE EGR SOLENOID OR EGR POSITION SENSOR.

Mar 25, 2011 | 2000 Pontiac Grand Prix

1 Answer

What will be wrong if I got code p0406 and p 404


both codes po406 and po404 refer to a fault in the EGR system
Po404 > Exhaust Gas Recirculation Circuit Range/Performance not within proper range.
Po406> Exhaust Gas Recirculation Sensor A Circuit High (meaning the circuit is open or disconnected)
Without actualy checking the voltages (wiring)
Replace the EGR valve
clear codes
test drive

Sep 07, 2010 | 2005 Dodge Caravan

1 Answer

1998 Cavalier 2.2L I'm pulling codes of PO404 and PO405 The First says EGR Flow CKT Range/Perf The second is a Circuit Low Input for EGR Sensor A. PO405 is a constant code while 404 came up only once, but...


In the top picture you can see egr adapter, three bolts, the egr valve mounts to adapter. Hope the picture gives you some orientation? You can see the 5 wire connector and wire colors. The bottom picture should be the egr valve.
egr 1-lkkjjxrk1tqhotv0eeqwlhlh-5-0.jpg

egr 2-lkkjjxrk1tqhotv0eeqwlhlh-5-2.jpg

egr 3-lkkjjxrk1tqhotv0eeqwlhlh-5-5.jpg

Mar 17, 2017 | 1998 Chevrolet Cavalier

1 Answer

2000 chevy truck 1500. I have 3 codes the computer is telling me po404, po405, po463


PO 404 exhaust gas reciculation circuit, range or performance problems
PO 405 exhaust gas reciculation sensor circuit low
PO 463 fuel level sensor circuit high input

Dec 04, 2009 | 1999 Chevrolet Silverado 1500

3 Answers

DODGE CARAVAN PO405 CODE


2005 dodge caravan po404 and po405 , changed egr valve an had only po405. now listen heres the punch line disconnect the battery and touch the cables together to drain the capacitors for 30 secs.reconnect an BAM po405 is gone if it dont work ill give you your money back.

Jan 22, 2009 | 2005 Dodge Caravan

2 Answers

I HAVE A 2005 3.3 DODGE CARAVAN HAS PO405 AND PO404. I PURCHSED NEW EGR VALVE IT ERASED CODES I DROVE SHORT DISTANCE AND THE 405 CAME BACK ON WHAT HAPPENED


egr valve replaced and check engine light comes back on with p0405-check wiring at connector-if ok try performing at battery static discharge-disconnect both battery cable ends-and touch cables together-this discharges all ecu capacitors and resets adaptive memory

Jan 22, 2009 | 2005 Dodge Caravan

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