Question about 2004 Isuzu Rodeo

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2004 isuzu rodeo 3.5L engine enginelight on code P1239 and reduced power light on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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clifford224
  • 1975 Answers

SOURCE: where is the port to

There is no port to check the fuel pressure on your engine. The way Isuzu has you check it is to disconnect the line a the fuel filter and you jump the terminals at the fuel pump relay (see picture below). You run the pump collecting the fuel that comes out of the line for 15 seconds. You should have at least .38 liters (don't know the conversion to pints or whatever). Now for some bad news. In most cases on your engine with the trouble code of P1239 it is the high pressure fuel pump. You have a secondary gear driven pump located/mounted on the back of the right (passenger side) cylinder head. That is what pumps high pressure to you fuel rail which in turn goes to the fuel injectors. Through my experience on many of these engines this is your problem. Now are you ready for some even better news ? That pump cost around $1,000 at the dealer and if you want a new one that's the only place to get it. I just did one a few weeks ago and did find a used one off of a wreck but it still cost me about $500.00 and it took me 3 weeks to locate one. It can be driven this way but it is hard. I am guess the reduced power light has come on and it is hardly moving. In most cases if you kind of give it a little extra gas it will build up the pressure enough to go out of limp mode but I did not recommend that because it is very unsafe in traffic. Below is a picture of that pump for you. I hate to be the guy to give you the bad news and I hope I am wrong but own a shop and this is a common thing for the 3.5 liter engines in both the Axiom and the Rodeo but they are different pumps so you have to get the one for the Rodeo only. If you have any questions feel free to email me at csautomotivecars@att.net and I can help you the best that I can including giving you an idea where to get a used one if you want. Hope this helps a little and good luck.


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Posted on Sep 17, 2011

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  • 75 Answers

SOURCE: reduced power light on, 2000 Isuzu Rodeo, can't go anywhere

all electrical power must come from an alternator an a good batterie to store it please ck your alternator or have it ck by an parts store clerk if the altrenator is bad (must develop 13 0r 14.5 volts output. anyting above that ,the alt is bad!) change it then ck your batterie an batterie connections terminals and all the 80 amp fuses on the fuses box nicolas

Posted on Dec 22, 2008

dj_ricko_198
  • 128 Answers

SOURCE: P1239

i have gone on the internet and looked up the code
however there was 3 2 different meanings to this one code
you need to check all oil levels as it is a warning for oil pressure as well as the throttle body
check the transmission motor oil power steering etc
if these are all fine then there is some trouble with the throttle body this is what i would pin it to.
it should be OK to drive home just be very careful keep it slow and try to stick to one speed
if it is the throttle body you will need a new one any way
if you have cruse control use it as it will keep the motor steady
avoid any harsh breaking or execrating as this makes tension KEEP IT STEADY DRIVE SLOW ABD YOU SHOULD BE ABLE TO GET HOME DON'T GO OVER 80KPH SO ABOUT 71MHP.
don't overtake don't apply power and dont use the aircon if you can help it as this all adds presure to the throttle body
if the throttle body breaks it will not damage your motor as i said you need to get it fixed any way so you cna take the chance
the worst that will happen is you will not make it home and your car wont run till a new throttle body is put on
we have a 2005 holden rodeo at work same as isuzu and we have had this problem it was the throttle body it is ine thing that is commen with in these cars
hope this helps
good luck getting home safley
ricko

Posted on Dec 28, 2008

  • 634 Answers

SOURCE: 2000 isuzu rodeo check engine light flashes when

are you checking code with a small simple scanner this will not always work, a larger more sophisticated unit may find code or runs codes at over 2500 rpms when light comes on

Posted on Oct 30, 2009

  • 1757 Answers

SOURCE: FIring Order of a 2004 Isuzu Rodeo 3.2L Engine

My apologies for the delay....Due to the bad economy the number of questions posted has skyrocketed 50% in the last 4-months.

For 2WD and 4WD it is the same:
For 3.2L:
Firing Order:
1-2-3-4-5-6
Cylinders:
5-------6
3-------4
1-------2
(front of vehicle)
Coil is on the Spark Plug

Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Posted on Feb 19, 2010

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I have a 2004 isuzu axiom. The check engine light, reduced power light, and abs light is on. The code reads p1239. i replaced the fuel pump and fuel pressure switch. It will not go over 25 mph. What could...


wow no engine stated, but the last car made is limited so you win this missing fact.
its a Rodeo , renamed for kicks.
and the last USA isuzu,,, after plant closed in Indiana.

p1239 from a real scan tool
autozone yelled one code over shoulder.a real shop did said thisyour $10 scan tool of fleabay showed only one code and lied?or a real scan tool, name it?
the first rule 1 of scanning is have the right tool, so you can see all codes, all federal codes P0xxx and all factory codes P1 p2. p3. and more......
missing codes is like being blind in one eye or worse.
no symptoms posted, just lights, my guess this is your 2nd anon post, and engine does lack power, but for got to say that. this post.

is the transmission slipping or is trans a manual stick?
1239

ill assume one code and use google to find it.
and usa car seem it is... or Costa Rica. 3.5 L 6VE1 V6 (gasoline)

ok engine nailed down. due to last car, and one engine there.

this code is an ISUZU only code , do not read other cars codes using this code or fail, (rule 2)


in fact P1 means just that, factory extended codes. as are P2,3.
car has a unique fuel pump controller box.
and 2 sensors. even more odd, that, for fuel pressure, not level.

so that means, what?
1: the pressure is wrong, (measure it? yet)
2: the sensor is failing (fibbing) if above passes test.
guess how you tell which. on my scan tool i can read all sensor live data. so this helps vastly

my book on the 3.5L sucks , it skips pressure spec.
i could not tell which sensor is upset, low or high, but low is a good guess. id prove that out first.

Mar 04, 2015 | Isuzu Cars & Trucks

1 Answer

Problem with the condenser of a chevi venture 1999


yes now next problem 2004 isuzu rodeo 3.5l direct injection
p1239 p1246 code

Jun 01, 2014 | 1999 Chevrolet Venture

1 Answer

Any ideas? Check Engine Light and Reduced Power Light for Isuzu Rodeo


check your fuses first the first codes are vac. leak codes related to fuel at fuel tank

Jul 06, 2012 | 2001 Isuzu Rodeo

1 Answer

Where is the port to check fuel pressure on a 2004 isuzu rodeo with a 3.5 litre v6 have a computer code of p1239


There is no port to check the fuel pressure on your engine. The way Isuzu has you check it is to disconnect the line a the fuel filter and you jump the terminals at the fuel pump relay (see picture below). You run the pump collecting the fuel that comes out of the line for 15 seconds. You should have at least .38 liters (don't know the conversion to pints or whatever). Now for some bad news. In most cases on your engine with the trouble code of P1239 it is the high pressure fuel pump. You have a secondary gear driven pump located/mounted on the back of the right (passenger side) cylinder head. That is what pumps high pressure to you fuel rail which in turn goes to the fuel injectors. Through my experience on many of these engines this is your problem. Now are you ready for some even better news ? That pump cost around $1,000 at the dealer and if you want a new one that's the only place to get it. I just did one a few weeks ago and did find a used one off of a wreck but it still cost me about $500.00 and it took me 3 weeks to locate one. It can be driven this way but it is hard. I am guess the reduced power light has come on and it is hardly moving. In most cases if you kind of give it a little extra gas it will build up the pressure enough to go out of limp mode but I did not recommend that because it is very unsafe in traffic. Below is a picture of that pump for you. I hate to be the guy to give you the bad news and I hope I am wrong but own a shop and this is a common thing for the 3.5 liter engines in both the Axiom and the Rodeo but they are different pumps so you have to get the one for the Rodeo only. If you have any questions feel free to email me at csautomotivecars@att.net and I can help you the best that I can including giving you an idea where to get a used one if you want. Hope this helps a little and good luck.


clifford224_520.jpg

clifford224_521.jpg

Sep 17, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

I AM HAVING A PROBLEM DIAGNOSING DTC CODE P1239 ON MY 2004 ISUZU PASSPORT. IT RUNS FINE FOR A FEW MINUTES< THEN THE CHECK ENGINE LIGHT AND REDUCED POWE RLIGHT COMES ON AND IT WONT GO OVER 30 MPH. IF I...


This would be
High fuel pressure system fault - Pressure high or low
1. check fuel quantity and quality
2. check for restriction
3. Open or short circuit condition
4. check repair resource for diagnostic procedure

May need a new fuel pump

Sep 29, 2010 | 2004 Isuzu Rodeo

1 Answer

2000 Isuzu Rodeo LS ~ check engine & reduced power lights


Do you know the OBDII codes? I just had to replace my Mass Air Flow sensor, it seems to have fixed my problems. But check the error codes.

Mar 30, 2010 | 2000 Isuzu Rodeo

1 Answer

Reduce power and check engine lights on


reduced power usally points toward a gas pedal to throttle correlation meaning the drive by wire system is where the problem is

Apr 18, 2009 | 2001 Isuzu Rodeo

1 Answer

P1239


i have gone on the internet and looked up the code
however there was 3 2 different meanings to this one code
you need to check all oil levels as it is a warning for oil pressure as well as the throttle body
check the transmission motor oil power steering etc
if these are all fine then there is some trouble with the throttle body this is what i would pin it to.
it should be OK to drive home just be very careful keep it slow and try to stick to one speed
if it is the throttle body you will need a new one any way
if you have cruse control use it as it will keep the motor steady
avoid any harsh breaking or execrating as this makes tension KEEP IT STEADY DRIVE SLOW ABD YOU SHOULD BE ABLE TO GET HOME DON'T GO OVER 80KPH SO ABOUT 71MHP.
don't overtake don't apply power and dont use the aircon if you can help it as this all adds presure to the throttle body
if the throttle body breaks it will not damage your motor as i said you need to get it fixed any way so you cna take the chance
the worst that will happen is you will not make it home and your car wont run till a new throttle body is put on
we have a 2005 holden rodeo at work same as isuzu and we have had this problem it was the throttle body it is ine thing that is commen with in these cars
hope this helps
good luck getting home safley
ricko

Dec 28, 2008 | 2004 Isuzu Rodeo

1 Answer

Code number P1239


says your fuel pump is the problem.. i looked up the code for you.

Dec 28, 2008 | 2004 Isuzu Rodeo

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