2006 Isuzu 4x4 D-Max Chronic sensor problems " check engine light" cutting horse power to Half. I have had the dealer replace at least 5 times and calibrations many times in between.. They will not cover the continued problem that has not been resolved sense the first 30 days of ownership. Any suggestions. Now my injectors are dirty and the fuel filters need replacement.

Your ISUZU D-MAX 4JK1 engine's low RPM may be a sign of a number of possible problems. The following typical causes and troubleshooting techniques can assist in identifying and resolving the issue:

Unclean or Clogged Air Filter: A dirty or clogged air filter might limit the engine's ability to breathe, which will lower power and revolutions per minute. If the air filter appears to be dusty or blocked, inspect it and replace it.

Fuel System Problems: Issues with the fuel system, such as a defective fuel pump, clogged fuel filter, or damaged fuel injectors, can lead to low RPM. Inspect the gasoline filter for obstructions and swap it out if required. It could be necessary to clean or replace the fuel injectors if they are unclean or not working properly. Furthermore, check the gasoline check the pump to make sure the engine is receiving a sufficient amount of fuel.

Engine Vacuum Leaks: When the engine's air-fuel combination is disturbed, low RPM and subpar performance result. Check for leaks or damage on the vacuum hoses and connectors, and repair any broken parts as necessary.

faulty Mass Airflow Sensor (MAF): The engine control unit (ECU) receives information from the MAF sensor, which monitors the amount of air entering the engine and modifies the air-fuel mixture accordingly. Inaccurate air-fuel ratios brought on by a malfunctioning MAF sensor can lead to low RPM and other performance problems. Use a multimeter or scan tool to test the MAF sensor, and replace it if necessary.

Problem with the Throttle Position Sensor (TPS): TPS keeps an eye on the location of the throttle pedal and transmits this data to the ECU for engine RPM control. Low RPM and other irregular engine performance can be caused by a malfunctioning TPS. If the TPS isn't working properly, test it with a multimeter or scan tool and replace it.

Exhaust System Restrictions: Low RPM and decreased engine performance can result from an exhaust system or catalytic converter that is clogged. Check the exhaust system for any obstructions or limitations, and replace any broken parts as necessary.

Engine Timing Problems: Low RPM can be caused by improper ignition timing or timing belt/chain issues, which can impair engine performance. Verify the timing of the ignition and look for any wear or damage on the timing belt or chain. If necessary, swap either the timing belt or chain and modify the ignition timing.
In case you are incapable of identifying or fixing the low RPM problem with your ISUZU D-MAX 4JK1 engine, it is advised that you get assistance from a certified mechanic or dealership for additional diagnosis and repairs. They can locate the root cause and take appropriate action by using specialist diagnostic tools and knowledge.

Question edited for clarity, year make model first and Codes are P-Zero and not P-letter Oh.
Question moved to model category.

Yes, if the crankshaft position sensor fails, the engine doesn't know when to fire the spark. Buy a quality OEM sensor and not a junk copy from Mexico. It is worth paying for a good one.

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Sounds like you have done a lot, maybe it is time to go back to the beginning and start over. Have you taken to a dealer I know they can flash the computer to correct some problems. Their code testers can read and diagnose more precisely what the problem is over the normal code reader. One thing which pops in my mind, my brother truck quit shifting and speedometer quit working on 2000 ford. I went and change the speed sensor and nothing changed. After changing the speed sensor I decided to check to see if the speed sensor had power. No power going to the speed sensor, I found the fuse for speed sensor was not blown but missing. Some one had removed the fuse. After putting a fuse in place everything worked fine. Just saying might need to start over from the beginning.
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what is this?
"Isuzu 4x4 3lt " (my guess now the 3.0L diesel
D-MAX the truck not sold in USA but in what country????? why is this so hard,
that lamp (check engine lamp) means what?
get it serviced, or scan it. (pick one?)
what year. ?2009, ok now we have the year,
thanks.

like pulling teeth,,, now country, ?????
country, country country......

this is USA Forum and you ask for facts on a truck not sold here. (why?)
and fail to say where you are. why?


so then i said scan it.
but guess what?, our Scan tools may not fit your non USA CAR, but what is the point ,after all i cant just mail you a USA scan tool.(bad idea)
nor can you find one in say Thailand.(pointless )
so why ask us?
lacking COUNTRY>

ours are OBD2,(obd2 is a USA invention)
others might copy it, sure. but it's OURS.
but that is a USA spec, tool,
in say Europe this IS and EOBD. tool
In Japan its JOBD.
Only your dealer of your truck can answer
this, what tools works in your truck, that country.

see?
why in the world do 1million posts here
and only like 4 show,country.
sorry cars are not the same world wide
nor are
brakes
EFI systems
smog parts.
lighting
safety parts.
scan tools
and and endless list.... ILL STOP HERE.


now my wild and useless guesses on TDI diesels.
1: get is serviced yet>?
2: filters>?
3: bad fuel (diesel, or contaminated) (checks)
4: scan it? using the tool that matches what ISUSU used in YOUR COUNTRY?
5: there are lots more tests, , the book at the dealer covers all this , called a Service manual,, and test to do...

only 1 clue here.
cutting out.

The engine misfires>? (shakes , but with lost POWER)
or
The engine totally stalls, (zero power)
can the fast right foot action , change the end results.

???
i cant drive it, so you must tell us.
the good, the bad and the ugly.
that means what the engine does right, hot or cold , all driving.modes.

I think that every wheel have the traction sensor so, either one of them is bad or all of them are. Check the front wheel fender and might sure that there is no openings specially close to the fuse box. If the problem persist just take it to your local Isuzu dealer. Good Luck!

Most auto stores (Autozone) will use a scantool to tell you what the problem is & clear off the check engine light. It is a free service, but I'd suggest bringing a pen/paper to write down the error code & Google it afterwards. It's definitely handy for getting rid of the check engine light.

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.

p0454 erratic evap pressure sensor signal
p0122 throttle position sensor circuit low
p0113 intake air temp signal low
p0305 cyl #5 missfire
i would look for a short or open wire somewere
i checked TSBs from kia and none pertain to you
clear codes and drive then check to see if they come back. then repost