How do I erase code P0405 on 05 equinox

Betty, Check the attached EGR links,instruction and guides, Good luck
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Um an egr valve isn't a part that your can just clean and it will fix your check engine light issues. You can remove it and if you see carbon buildup you remove it but more than likely it needs to be replaced. There are some new fuel additives that improve emissions and clean catalytic converters maybe these additives also clean the egr valve. Hope this helps good luck

You need to diagnose the EGR System
Not replace parts in hope of getting it right
Codes only indicate an Emissions Malfunction
or Fault, thus the code
Codes & trouble charts are used to then component test
Google the code & study the problem
There are many EGR Codes--- study yours ,as it pertains
to your vehicle & engine package
Try You Tube Video-- to get a basic of what egr system is & does

Hi there:



EGR system components:


Intake manifold shield retaining bolt (2 required)
Intake manifold shield
Exhaust gas recirculation system module electrical connector
EGR system module
EGR system module gasket
EGR vacuum connector
EGR system module retaining bolt (2 required)
EGR tube fitting
EGR tube


EGR Valve / 3.8L Engine

1. Disconnect the negative battery cable.
2. Detach the vacuum line(s) and/or electrical connector(s) from the EGR valve.
3. Remove the mounting bolts, then remove the EGR valve. Remove all old gasket material.

To install:

1. Using a new gasket, install the EGR valve, then secure using the retaining bolts.
2. Attach any vacuum lines or electrical connectors disengaged during removal.
3. Connect the negative battery cable.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Hi there:



EGR system components:


Intake manifold shield retaining bolt (2 required)
Intake manifold shield
Exhaust gas recirculation system module electrical connector
EGR system module
EGR system module gasket
EGR vacuum connector
EGR system module retaining bolt (2 required)
EGR tube fitting
EGR tube


EGR Valve / 3.8L Engine

1. Disconnect the negative battery cable.
2. Detach the vacuum line(s) and/or electrical connector(s) from the EGR valve.
3. Remove the mounting bolts, then remove the EGR valve. Remove all old gasket material.

To install:

1. Using a new gasket, install the EGR valve, then secure using the retaining bolts.
2. Attach any vacuum lines or electrical connectors disengaged during removal.
3. Connect the negative battery cable.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

P0404
EGR Sensor Circuit Range/Performance, Stuck Open, to fix, either clean out or replace it, this should do it. p1404 relates to same problem. replace EGR and you should be ok. dont forget to clear the code when repaired.

Sorry I dont have a pic. for you. But here are instructions. The EGR valve is located at the top right of the engine next to the throttle body. REMOVAL & INSTALLATION
Except Linear EGR Valve

Disconnect the negative battery cable.
Remove the air cleaner assembly from the engine.
If equipped, unplug the valve electrical connection.
Remove the EGR valve vacuum tube from the valve.
Remove the EGR bolts and/or nuts and remove the EGR valve and gasket.
To install:
Install a new gasket to the EGR valve and install the EGR valve to the manifold.
Install the nuts and/or bolts. Tighten the bolts to 17 ft. lbs. (24 Nm) and the nuts to 15 ft. lbs. (20 Nm).
Connect the vacuum tube to the EGR valve.
If equipped, attach the valve electrical connection.
Install the air cleaner and connect the negative battery cable.
Linear EGR Valve
Disconnect the negative battery cable.
Note the position of the EGR valve prior to removal. Do not rotate the valve 180?.
Unplug the valve electrical connection..
Unfasten the valve retainers, then remove the valve and the gasket.

To install:
Clean all gasket residue from the gasket mating surfaces.
Install a new gasket and the valve.
Install the valve retainers.
On 1994-97 2.2L engines and 1994-95 4.3L engines, tighten the valve retainers to 17 ft. lbs. (24 Nm). On 1998-99 2.2L models, tighten the retainers to 19 ft. lbs. (26 Nm).
On 1996-99 4.3L models, tighten the retainers on the first pass to 89 inch lbs. (10 Nm) and on the final pass to 18 ft. lbs. (25 Nm).
Attach the valve electrical connections and connect the negative battery cable.

Fig. 4: Exploded view of the EGR system and related components for the 4.0L engine (click over pic for zoom)

REMOVAL & INSTALLATION

PFE/DPFE Sensor
This component is found on all engines, and is also referred to as the backpressure transducer.

1. Disconnect the negative battery cable.
2. Detach and label the wiring harness connector from the PFE/DPFE sensor.
3. Disconnect all of the hoses from the sensor.
4. Remove the mounting nuts, then separate the sensor from the mounting bracket.
5. If necessary, remove the EVR solenoid and the PFE/DPFE mounting bracket from the upper intake manifold.

To install:

1. If removed, install the EVR solenoid and mounting bracket onto the upper intake manifold.
2. If applicable, install the EGR tube heat shield.
3. Position the PFE/DPFE sensor on the mounting bracket, then install and tighten the mounting nuts until snug.
4. Attach all necessary hoses and wiring to the sensor.
5. Connect the negative battery cable.

EGR Vacuum Regulator (EVR) Solenoid
The EVR solenoid is mounted either on the same bracket as the PFE/DPFE sensor, attached to the upper intake manifold, or near the EGR valve on its own bracket.

1. Disconnect the negative battery cable.
2. Label and detach the wiring harness connector from the EVR solenoid.
3. Detach the main emission vacuum control connector from the solenoid.
4. Remove the retaining nuts, then separate the solenoid from the mounting bracket.

To install:

1. Position the solenoid on its mounting bracket and install the retaining nuts.
2. Attach the main emission vacuum control connector and the wiring harness connector to the EVR solenoid.
3. Connect the negative battery cable.

EGR Valve
See Figures 6 and 7

1. Disconnect the negative battery cable.
2. If necessary, remove the air inlet tube from the throttle body and air cleaner housing.
3. Label and detach all vacuum hoses from the EGR valve.
4. Label and detach any electrical wiring harness connectors from the EGR valve.
5. Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve.
6. Remove the EGR valve mounting fasteners, then separate the valve from the upper intake manifold.
7. Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold.
   

Fig. 6: Cutaway view of a base entry type EGR valve

Fig. 7: Cutaway view of a side entry type EGR valve

To install:

1. Install the EGR valve, along with a new gasket, on the upper intake manifold, then install and tighten the mounting bolts to 4-22 ft. lbs. (20-30 Nm) on 3.8L engines, or to 106-49 inch lbs. (1-18 Nm) on 5.0L engines.
2. Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 30 ft. lbs. (41 Nm).
3. Connect all wiring or hoses to the EGR valve.
4. Install the air inlet tube.
5. Connect the negative battery cable.

Hope this helps, good luck (remember to rate this comments).

The problem is that your EGR valve needs replaced. What these do is they allow a precise quantity of exhaust back into the intake manifold; Provides a great help for an efficient combustion process and improved engine performance, when thes go bad your perfomance drops off and it does not run as clean.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum-controlled valve which allows exhaust back into the intake manifold in controlled amounts. The EGR valve can clog and get contaminated over time by carbon buildup, at which point it will require replacement. A malfunctioning valve can cause the engine exhaust pressure to drop and send engine warnings to the computer. It can also cause engine back pressure to drop, reducing gas mileage and engine
This is for a dodge ram, as I have no idea what car you have but this is a general tip.

Locate the EGR valve in the engine bay. The year and make of the Dodge vehicle determine where the valve is located. This is on the front of the engine block, next to the timing belt in model-year 2005 and newer trucks. In older vehicles you will typically find the valve behind the engine, near the firewall.

Unclip the exhaust tube from the side of the valve. You can do this by hand. Shift the tube from side to side until it slides off.Use a flat-head screwdriver to remove the EGR valve from the exhaust tube. There is a screw on each side of the tube.

Disconnect the harness from the EGR valve. Use your hand to pull up on the tab and slide the harness from the valve.

Use a flat-head screwdriver to remove the two screws that secure the EGR valve to the cylinder head. Remove the EGR valve and clean the surface of the cylinder.

Attach the new EGR valve to the cylinder head and tighten it down with the same screws that were previously installed.

Reattach the harness and reattach the exhaust tube to the valve. Tighten the two flat-head screws that hold the tube to the valve.

Reattach the hose to the valve and use your hand to attach the clip to the hose.

it looks much harder then it is, the best thing for you to do is buy the new EGR valve so you have a reference to look at. then remove the air intake hose and top of air cleaner box, then look at were the throttle and cruse cables attach's to the throttle body you will need to remove the steel bracket that holds the cables to the throttle body then remove the two bolts that hold EGR valve and the plug in on the top and replace the valve, take your time and don't panic at is basic auto shop 101. Just think if you can get it done your self ( and you can ) think of all the money you will save............HAVE FUN