Question about 1999 Isuzu Rodeo

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Code P0401 on my 99 isuzu rodeo. I had the EGR vavle changed and the tube cleaned out. The check engine light still comes on. What else can it be?

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Egr soleniod

Posted on May 14, 2010

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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

1 Answer

My car sounds bad. it smells like gas when started. and it runs bad. also the check engine light is blinking


Check engine light is blinking a code, a auto parts store can read codes for you most the time its free, sound like maybe a few diff things, the EGR valve maybe stuck open or shut, or a O2 sensor, or Mass Air Flow Sensor, they do make a mass air flow cleaner thats the only thing you can use on it, the mass air sensor is just after your air filter on the tube that runs to the motor, the O2 sensors are on the pipes before and after the converter. Egr vents the non burnt gas back in your motor to re burn it the pipe coming off the manifold back up to the top of motor should see a egr would have a round diaphram looking thing on it. start with the codes being read at auto zone or O''rillys. i know on that that Rodeo you have to change the PCV valve about every 15,000 mi it vents the air out of the motor, run about $3, worst case senario it jumped time,

Mar 09, 2011 | 1998 Isuzu Rodeo

1 Answer

97 isuzu rodeo, check engine light with po401 code changed egr valve without success, was looking at evap, and now wondering about dpfe sensor, info is good


DPFE is a reasonable concern. There is also a very thin tube from the EGR to the DPFE that plugs up with carbon. Check the tube prior to the DPFE.

Feb 24, 2010 | 1999 Isuzu Rodeo

1 Answer

I have a 2000 Isuzu Rodeo, V6. The car stalls at


it's the EGR valve and can be fixed by anyone. It involves disconnecting the battery, remove electrical connection, and removing 2 screws and cleaning the surface area well and replacing it as well as the gasket. A new EGR valve runs around $120 and trust me you can fix this and save hundreds!

Feb 02, 2010 | 2000 Isuzu Rodeo

2 Answers

How can i reset check engine light


with a scan tool or if problem fixed sometimes reset on own after about 125 miles or so--also some auto stores such as auto zone/advanced auto scan vehicles for free and also can reset some of the codes depending on what they are

Oct 19, 2009 | 2001 Isuzu Rodeo

1 Answer

Engine light was on and engine idles rough.


these O2 sensors are cat convertor check sensors. id be checking cat convertors and hopefully you should try replacing if not all ready is the front bank 2, O2 sensor
if you have scanner can you see fuel trims in data display to confirm high fuel trim only on bank 2 either +-5 or more indicates problem and if bank 2 sensor 2 has fixed high 700mv reading cat no good(warm idling)

Jul 10, 2009 | 1998 Isuzu Rodeo

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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