Question about 2004 Chevrolet Tahoe

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04 tahoe check engine light on,tried to check with scanner,but no power to obd2 connector.

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Check all the fuses with a 12 volt test light. Also does the cigar lighter work many times the same fuse that is for the cigar lighter also powers up the obd 2 connector.

Posted on Jan 07, 2009


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Check engine light doesnt illuminate when key turned on

You will have to check if there is other bulbs off when bulb check then have a pin out check on obd2 connector if power and ground. and with a scanner can you check if there is any engine code

hope it help

Jul 10, 2015 | 2003 Pontiac Bonneville

1 Answer

The OBD2 is not communicating with scanners or Verus what do I do?

i once found that the 12volt accessory fuse is blown. its was also the same one for the ECU thats the reason it does not connect

Mar 06, 2015 | 2002 Nissan Maxima SE

1 Answer

Location of plug on car for my scanner to check trouble codes.

what country? having the connector does NOT mean it complies
with USA OBD2 systems and tools, so not posting country , all answers are impossible. if you google the you will see that repeated like 1million times.
LHD or right hand drive?
if in USA, LHD all cars here are OBD2 16pin Dshell connectors.
and 100% OBD2 compliant.
and are all 1 meter steering wheel center , but sady that is like 10 places. i can sniff any out i 5min flat with a flash light.
2nd google hit.
  • The 2002 Suzuki Vitara OBD 2 port is on lower edge of dash, right of steering column; near center console
only the FSM covers this.

oddly suzuki puts them in plain site.... ever look for it?

my 04 its lower left edge of dash. in plain site, (usa car)

Feb 20, 2014 | 2002 Suzuki Grand Vitara

1 Answer

What does "engine system faulty" warning light mean

If you want to debug the problem yourself, the first thing to do is to buy a engine OBD2 scanner. When the code show up, you may see what is the problem using the OBD scanner and your cell phone, with the proper app (like Torque for Android).

Remember to check if you are buying a bluetooth OBD2 scanner, and your phone have bluetooth as well.

One more thing, the OBD2 connector on the Peugeot 307 is right behind the ashtray, remove it to have access to the OBD2 connector.

The most probable cause is the fuel intake, may be the fuel, a filter or even the electric gas pump. Just a OBD2 scanner will tell you accurately the cause of the problem.

Best Regards

May 07, 2013 | 2006 Peugeot 307 2.0

3 Answers

My 2004 Tahoe LT was put on a diagnostic machine and did not give any codes. The tech said that there was no power coming from my diagnostic plug.

I'm thinking Marcos is on the right track. In todays world with all the gadgets such as phones and GPS's, they tend to get plugged into the cigarette lighter. These cigarette lighter circuits are not able to handle the amps our gadgets put out which in turn blows the fuse which just happens to be the same circuit as the power for your data link connector plug. Below is a fuse layout diagram for the fuse panel located under the hood of the vehicle in the engine compartment. I have marked the fuse you need to check (it should be a 15 amp fuse). If the fuse is good then you may want to check directly at the data link connector on the left side under the dash where the tech who tried to get codes for you plugged in his scanner. Below the fuse diagram is a picture of the data link connector. The top of the DLC is wider then the bottom (like a triangle kinda). I have marked the terminal of that connector that should have the power (lower, bottom part of the "triangle". the narrow not wide). That terminal which should have an orange wire is you power wire. If you have power, you may be looking at a ground proplem or if it doesn't have power and the fuse is good, you will need to locate the open wire to find your power loss. On a personal note, if it is just the fuse that's blown, I don't think I would take my vehicle back to that same tech. Pretty much every tech with a little knowledge should know that this is the first place to look if not getting popwer at the DLC. Hope this helped you out.....


Feb 03, 2013 | 2004 Chevrolet Tahoe

2 Answers

I have a 1995 Ford Explorer Limited and the high beams work but the low beams and fog lights do not, please help....

These trucks are known for bad multifuction switches.
the switch that i talk of is the signal switch , the handle is the switch, it bolts to side of steering column . this switch controls the signals and the headlights and high /low beams. the other thing is the headlight switch connector, the connector some times goes bad and starts to melt or just comes out of the connector. you will need to remove the cover to steering column, the screws are located under the bottom cover in holes. remove cover and check connector and then test for power if you have power going into switch but not coming out then switch is bad.

the last thing is to make sure the bulbs are good , make sure the headlight bulbs are good , and also the driving light bulbs, test for power at the connectors to those lights to.
You will need to do a little testing to find the problem.

Nov 22, 2012 | Cars & Trucks

1 Answer

Why does my tahoe keep displaying reduced engine power? The drivetrain and traction control lights also came on.

There is a service bulletin for this concern.The number is 07-06-04-019A.It has to do with the body harness instrument panel connector.It is on the left hand kick panel area inside the instrument panel.You should have the codes checked.You will probably have a P 2138 code.This is for the accelerator pedal position sensor 1 and 2 correlation.Hope this helps.

Dec 19, 2009 | 2005 Chevrolet Tahoe

1 Answer

I've hooked up 2 different scan tools to my 04 tahoe and both times it didn't read anything. The check engine light is on and there is also a rattling noise from the cat.

If you have a catalytic converter is rattling it can be replaced for free if you have under 80k.Same with the PCM.They are both covered for 8 years 80k miles.If the check engine light is on it should show the codes.The only thing is not all scanners work.Also there was a bulletin for some G.M. vehicles that had to be reprogrammed for after market scanners to work on them.

Nov 11, 2009 | 2004 Chevrolet Tahoe

2 Answers

Obd 2 connector does not work with any code scanner

HI there....Check to see if the code reader is a CAN OBD 2 code reader. If it is only OBD2 , that may be the problem. In 2003 Some vehicle manufacturers ( ford,Gm,Mazda and Saab) began using a new computer protocol called Controller Area Network (CAN) with the OBD2 and if your vehicle is CAN OBD 2 the simple OBD2 code reader will not work.Contact your local dealer to determine if you vehicle is CAN or not or find a code reader that is CAN OBD2 capable. Hope this helps you out

Jan 24, 2009 | 2004 Chevrolet Tahoe

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