Question about 1994 Chevrolet Caprice Classic

Open Question

My 2004 suburbans check engine light is on can't read codes withobd1 anylizer

Why can't my obd1 read codes

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
  • 2042 Answers

SOURCE: 1997 suburban sevice engine light came on

insufficient switching bank 2 sensor 1 that mean the oxygen sensor on the passager side dont change voltage fast enought remove clean it or if it old change it hope it help FIXYA OUR POST thanks pierre

Posted on Jul 12, 2008

Testimonial: "THIS WHAT WAS EXACTLY WRONG WITH IT CHANGED O2 SENSOR OUT RUNS GREAT THANKD"

Ad
nate6556
  • 103 Answers

SOURCE: 2004 colorado code p0172

check your gas cap. If you fill your gas while the vehicle is running, it will also cause your light to come on. Go to OReilys or Autozone and they will shut it off for free and tell you the problem

Posted on Jul 25, 2009

wracefans24
  • 1985 Answers

SOURCE: 2004 chevrolet suburban intermittently displaying

you need to check fluid level in radiator,low coolant will cause your problem,but fill the resivour too,
you need to see if you lost fluid first,then check fan operation,

Posted on Dec 09, 2009

  • 743 Answers

SOURCE: WHY CAN'T I GET ANY CODES ON MY 1994 3.4 CAMARO

The only way those type of scanners will give you a code is if it is a hard code. When a check engine light is on, but doen's flash it is usually referring to an emission problem. A flashing light refers to misfire. Spark plugs, wire, etc. A snap on scanner or Genesis Scanner is able to look at perimeters inside the system which is a better approach when you don't have a hard code. Sometimes after the code is on long enough it will become a hard code and the type of scanner that you have will pull it. The thing that often happens is the EGR isn't circulating properly and you get an intermediate light and don't get a hard code for a while which leaves you in the dark. You might take your vehicle to a local service shop which uses a better scanner and they can look at what is going on and solve that problem.

Posted on Mar 07, 2010

Testimonial: "You are correct. However I'm not enen getting the code 12 that the system is working. I think my computer might be fried? "

duane_wong
  • 6826 Answers

SOURCE: How to check out the codes on check engine light a

1988–95 MODELS Listings of the trouble for the various engine control system covered in this manual are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones. Fig. 1: ALDL connector — 1988–92 models 84904060.gif
The Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

  1. The diagnostic trouble codes can be read by grounding test terminal B. The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
  2. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
  3. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition OFF and remove the jumper wire. Turn the ignition ON and confirm that light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
  4. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the ECM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent. Fig. 2: ALDL connector — 1993–95 models 84904061.gif

  5. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest. NOTE: The order of codes in the memory does not indicate the order of occurrence.
  6. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
  7. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
  8. Switch the ignition OFF when finished with code retrieval or scan tool readings. NOTE: After making repairs, clear the trouble codes and operate the vehicle to see if it will reset, indicating further problems.
prev.gif next.gif

Posted on Jul 12, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I need to no the meaning of this code evp0174 ?


Too lean, check for a vacuum hose off or cracked.

Feb 01, 2015 | 2004 Chevrolet Suburban

1 Answer

Rough idle smooths out when the gas is applied


First off is your check engine light on? I know you said your scanner doesn't read OBD1 (pre96) but it wouldn't matter if it did if your engine light isn't on there wont be anything to read.

while it sounds like a misfire it is possible your timing is off.

To be sure, there is a trick you can do to to read the codes if the engine light is on. theres a video on youtube that gives a decent explanation of how to read it, best part is its free. Although Im not sure about the location of the code reading port on your 91, if it isn't in the normal location like the one in the video just google search OBD1 code port location (then year make and model) shouldn't be hard to find.

here's the vid: http://www.youtube.com/watch?v=V8nZpQyoRh4

Sep 01, 2012 | 1991 Chevrolet Lumina

1 Answer

Obd1.5


I suggest you use an OBDI code reader.

Jan 01, 2018 | 1995 Buick Regal

1 Answer

How Do i check my ecm on my 1994 plymouth voyager with a 2.5?


You have OBD1 which is the diagnostic used prior to 1996. In your car you have to read the trouble codes stored in the computer. This done by counting the flashes and pauses of the check engine light. Turn the ignition on then off three times then leave it on. The check engine light will begin to flash i.e on---on-on. that would be a 12. You can google obd1 for a list of codes and more detail on how to read them. Obd2 is a vast improvement

Jan 05, 2011 | 1994 Plymouth Voyager

1 Answer

2004 chevrolet suburban service engine light flashing - what does this mean?


If you have - or can borrow an OBD tester - down load the diagnostic codes and check in the manual for their meaning. You can also shunt the dianostic port with a wire and read the flashes off of the instrument panel to see the codes being flashed and find their meaning in the appropriate service manual (this manual will also tell you how to properly shunt the dia port). A GM dealer will sometimes advise on this.

Nov 23, 2010 | 2004 Chevrolet Suburban

2 Answers

What's causing my 95 chevy suburban to cut out while i'm driving-it's as if the car turns off completely then turns back on....


have u run a fault code test on this, there is most likely a code to explain the problem, it will be in the ignition system, most likely a crankshaft position sensor. here is how u ruin a test for fault codes, go to the link

http://check-engine-light-codes.blogspot.com/2006/03/gm-1983-95-vehicles-obd1-codes-self.html

Feb 12, 2010 | 1995 Chevrolet Suburban

1 Answer

94 Chevy Suburban runs 1 minute and shuts off like


This is an electronic engine control problem do u have any system fault codes? u need to check them, here is how to do that, go to the link.

http://check-engine-light-codes.blogspot.com/2006/03/gm-1983-95-vehicles-obd1-codes-self.html

Feb 02, 2010 | 1994 Chevrolet Suburban

1 Answer

Check engine light, but no code


first what year it may be obd1 system roll key on and off 3 times if it is obd1 it will start flashing first code will be 1 flash then 2 quick flashes this is code 12 thta means computer is reading codes then just start counting flashes they will be intermitant ie 1 flash then 3 quick flashes means 13 and so on when you get to the end of codes it will flash 5 quick then 5 quick again that is the end of your codes

Apr 02, 2009 | 1996 Jeep Cherokee Sport

Not finding what you are looking for?
1994 Chevrolet Caprice Classic Logo

Related Topics:

18 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

84966 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...