Question about 2007 Isuzu MU-7

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Isuzu D-Max engine light comes on. Replaced EGR and Sucksion release valve. Light still comes on.

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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 11, 2010

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How to fix speed sensor comes light?

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2001 Isuzu Rodeo 4 cylinder Check Engine Light


Normally a shop would use a scanner to watch the operation of the EGR valve and sensor.
Code 401 means the sensor is telling the computer the flow is not enough. So the problem could be the sensor rather than the EGR valve. And yes one of the ports could be blocked too.

Jun 28, 2013 | 2001 Isuzu Rodeo

2 Answers

Engin light #po406 2005 ram quad cab


P0406 - Exhaust Gas Recirculation Sensor A Circuit High

Early Models : The EGR valve control the amount of exhaust gas routed to the intake manifold. Vacuum is applied to the EGR valve in response to the throttle opening. The vacuum control the movement of the taper valve connected to the vacuum diaphragm in the EGR valve.

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Late Models : The EGR volume control valve uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECM. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECM does not issue the pulse signal. A certain voltage signal is issued so that the valve remains at that particular opening.

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Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hesitation

Possible causes
- Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control solenoid valve
- EGR temperature sensor and circuit

Possible solution
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve
When is the code detected?
- An improper voltage signal is sent to ECM through the valve


Hope helps.

Mar 06, 2011 | 2005 Dodge Ram

2 Answers

EGR valve is being cleaned due to "Check Engine"


CLEANING THE VALVE WILL NOT RESOLVE THE ISSUE, IT SHOULD BE REPLACED.

Dec 15, 2010 | 2002 Isuzu Trooper

3 Answers

Code P0401 EGR Insufficient Air flow detected - 2000 Toyota camry


how I change the EGR valve assist switch for toyota camry 2000

Jul 29, 2009 | 1996 Toyota Camry

1 Answer

Check engine light on due to issue with EGR valve


You need to reset the cars cpu,..you can do this by unhooking the negative side of the battery for about 10 minuts,then if the light comes on again,run the obd2 reader again,because there is another problem.

Apr 13, 2009 | 2001 Isuzu Trooper

1 Answer

Check engine light


yes you will have to hook it to a scan tool and erase the dtc or the light will stay on. sometimes you can unhook the battery for 30 sec or pull a fuse or turn the key on and off a couple of times

Dec 09, 2008 | 1999 Isuzu Rodeo

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