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2004 Isuzu Rodeo 2WD 3.5L V6 DTC 1239 present. Need help!

2004 Isuzu Rodeo 2WD 3.5L V6 DTC P1239 present. Replaced the following regarding the above DTC P1239. - Replaced Electronic Throttle Body - Replaced High Fuel Pressure Sensor (Under Intake Manifold) - Replaced Low Fuel Pressure Sensor (Fuel line near Transmission Side) - Replaced Fuel Pump Unit - Replaced Mass Air Flow Sensor - Replaced O2 Sensor Bank #1 Sensor #1 - Replaced O2 Sensor Bank #2 Sensor #2 Smoke Check with a Snap On Smoke machine for any type of vac leaks, no leaks present. At this point not sure what to look towards to. All connections from PCM to each sensor shows within spec resistance. When the DTC P1239 codes pops up, CEL comes on and there is a "Reduce Power" Light that shows up on the Gauge Cluster as well. Any help or directions would be greatly appreciated. Thanks

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Posted on Jan 02, 2017

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SOURCE: Repalced O2 sensors, mass air flow sensor, and plugs error messag

dpfe velve

small emissions valve with one electrical connnector and three to four vacume lines located near your egr valve. this is a comon fault on fords emmissions system.

Posted on Aug 15, 2009

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SOURCE: Oldsmobile Delta 88, Idles High on Cold start with DTCs

Sounds like a vacumn leak. Gasket under intake plenum may be leaking. Be sure the pcv valve has the o-ring around it in the correct place also as it will set a code.

Posted on Mar 11, 2010

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1 Answer

Where is camshaft sensor located on 2004 isuzu rodeo V6 3.5ltr

SENSORS (plural)
3.5L 4 cam engine? 6ve1? it has a real name BTW.
known real names makes help more easy and 10x buying parts.
on the 4 cam there are 2 CMP sensors on rear of heads


if scans say it's ok, then it's ok (if dead start?, crank for 5 full seconds,see DTC now? )
no symptoms stated,why?

lean that scan tools show history of DTC errors(if lucky)
and live errors
the live errors are what makes savvy diagnosis win.
use the scan tool and learn to use it,its not hard.

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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?

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.

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How remove the starter on a 2004 isuzu rodeo 2wd 3.5L v6

where is the starter located at on my 2004 izuzu rodeo

Dec 03, 2010 | 2004 Isuzu Rodeo

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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

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1 Answer

Firing order for a 2000 isuzu rodeo v6 2 wheel drive

2000 Isuzu Rodeo LSE 2WD 3.2 liter DOHC V-6


Hope helps (remember rated this).

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1 Answer

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:
(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!

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1 Answer

How do you put a 1992 isuzu rodeo back in time?

you mean the timing chain broke??? you will need it replaced and when they do that, it will be back in time.

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