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Isuzu Trooper Check Engine Light

31 messages,  Last post on Nov 21, 2009 at 6:10 PM

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What is this discussion about? Isuzu Trooper II, Engine, SUV

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#10 of 31 Re: Check Engine light [atfdmike] by wlbrown9 Jun 15, 2007 (6:54 am)
Replying to: atfdmike (Jun 15, 2007 3:32 am) Here is a link to the FAQs. Look at the section on EGR cleaning. Might help...you might be able to remove and clean it, if not you can just replace it.   http://www.isuzufaq.com/
#11 of 31 99 trooper erg valve issues by mcharger Feb 20, 2008 (4:41 pm)
get po401 error replaced erg valve light went off took to get IM inspection came back on failed with same error drove it for about 50 miles light went off again stayed off for 2 days now back on same error took to mechanic has no clue hard to find Isuzu dealers in UT any ideas what else problem could be---mechanic says could be wiring from valve or the whole computer. Random on and off of the check engine light with always same p0401 code. Really fustrated Replies to this message: atfdmike (Feb 21, 2008 5:38 am)
#12 of 31 Re: 99 trooper erg valve issues [mcharger] by atfdmike Feb 21, 2008 (5:38 am)
Replying to: mcharger (Feb 20, 2008 4:41 pm) Hi, welcome to the forum. I am not sure which engine you have, as I have the older 3.2, but I did a quick search for you and found the following. It is a pretty common problem, and if you can figure out the location on your engine and clean it (try carb cleaner first, I think) by flushing it and soaking it to loosen deposits, you could resolve the problem. HTH   " The car will not idle correctly, is difficult to start and runs rough much of the time. My truck did not do any of that. I was also told that in many cases, the insufficient flow may be from carbon in the passageways to and from the EGR valve. After some closer looking with a flashlight in hand, I found a plug that has access to the line between the ERG and the cylinder intake. The plug is located below the EGR unit on the left hand side. You will need a set of hex keys to remove this plug. Once I had the plug removed, I had clear access to the horizontal passageway to the engine intake. I quick inspection did show quite a bit of carbon build up within. To clean the passageway, I broke out my gun cleaning kits and used the barrel brushes attached to a 12 inch section of rod. I believe that it was the .40 caliber brush that was the closest in size. I also used the generic carb cleaner in the process as well. This scrubbing did remove much more buildup than I imagined. I installed the plug back in it’s place and have not had a 401 so far. So I believe that possibly could have been the problem. "
#13 of 31 98 Trooper Check Engine Light by mckellar Feb 21, 2008 (9:00 am)
My check engine light came on Code P0171 system too lean. How can I correct this? Replies to this message: atfdmike (Feb 21, 2008 6:03 am)
#14 of 31 Re: 98 Trooper Check Engine Light [mckellar] by atfdmike Feb 21, 2008 (6:03 am)
Replying to: mckellar (Feb 21, 2008 9:00 am) The fact that the mechanic did not try to sell you O2 sensors leads me to believe that maybe what you need is a good long high speed run on the freeway to burn some of the carbon deposits on the valves, etc. After doing so a couple times, clear the code and see if it comes back. Post your results. HTH
#15 of 31 trooper 98 check engine light by icarus681 Sep 22, 2008 (10:10 am)
I am having this problem for a couple of months now.The trooper has a PO171 code. I already change the 4 o2 sensor, clean the egr and reset the ecu.the trooper has 100,000 miles on the odometer and it has the original catalytic converter.I do not know for sure if this has something to do with the codes,and when i stand behind the muffler i notice the smell of rich mixture instead of lean mixture.if there is a answer for this codes,do i have to do the same as the other post or do i have to do other things? Replies to this message: brentb1 (Jan 14, 2009 3:14 pm) icarus681 (May 05, 2009 5:02 pm)
#16 of 31 Isuzu Trooper by isuzu02 Jan 14, 2009 (1:20 pm)
Hey, I have an 02 Trooper 3.0L Turbo and the check engine light keeps flashing when i do around 50mph- any ideas what this could mean??
#17 of 31 Re: trooper 98 check engine light [icarus681] by brentb1 Jan 14, 2009 (3:14 pm)
Replying to: icarus681 (Sep 22, 2008 10:10 am) check your intake manifold gaskets for leaks.when the vehicle is cold start it up and spray brake clean/ether at the gaskets,if the idle raises they are leaking.let me know what happens. Replies to this message: icarus681 (May 05, 2009 5:02 pm)
#18 of 31 Misfire, trouble codes, P171, P174, and P303 by sealfrog Jan 24, 2009 (7:54 am)
Engine runs rough at idle, once you get it going it seems to run okay, check engine light and three trouble codes, P171, P174 and P303. Left bank lean, right bank lean and misfire on cylinder #3. Change #3 plug, also trouble code book said MAF sensor bad. It got to the point that the engine would run rough at idle then die. Of course it would start up but you have to keep the rpms up or it would die. I unpluged the MAF and it would not die, within 30 secondsof pluging MAF back in engine dies. Bought a new MAF, it no longer dies but still runs rough and still gets the three trouble codes. signed sealfrog Replies to this message: brentb1 (Jan 24, 2009 3:39 pm)
#19 of 31 Re: Misfire, trouble codes, P171, P174, and P303 [sealfrog] by brentb1 Jan 24, 2009 (3:39 pm)
Replying to: sealfrog (Jan 24, 2009 7:54 am) your intake manifold gaskets are bad.replace them.only takes about 40 minutes and 32.00 from autozone.

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