Question about 1998 Pontiac Sunfire

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98 Pontiac Sunfire 2.2l Reading engine codes

How do you read engine codes on a 98 sunfire?Can thay be read through the assembly link? if which terminals do I use.Thanks in advance.

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You need a OBD-II code reader or take it to autozone they do it free

Posted on Oct 23, 2008

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98 oldsmobile 88 royale code 12 and 41 what could be the problem


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GM Bonneville/Eighty Eight/LeSabre 1986-1999
Reading Codes

Print


1987-97 VEHICLES EXCEPT 1997 MODELS WITH 16-PIN DLC

See Figures 1 and 2
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.


0996b43f8021af66.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: ALDL/DLC terminal identification for 1987-97 vehicles, except 1997 models with a 16-pin DLC
The Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC) may be located under the dashboard, and is 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 switch OFF and remove the jumper wire. Turn the ignition ON and confirm that the 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.
  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.

The order of codes in the memory does not indicate the order of occurrence.
  1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
  2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
  3. Switch the ignition OFF when finished with code retrieval or scan tool readings.

After making repairs, clear the trouble codes and operate the vehicle to see if it will reset, indicating further problems.

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Fig. Fig. 2: Engine diagnostic trouble codes - 1987-93 vehicles, and 1994 vehicles with a 12-pin DLC connector


197 VEHICLES WITH 16-PIN DLC AND ALL 1995-99 MODELS

See Figures 3 through 7


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Fig. Fig. 3: DLC terminal identification for 1994 vehicles with a 16-pin DLC, as well as all 1995-99 models
On 1994-95 3.4L and 3.8L engines, and all 1996 models, an OBD-II compliant scan tool must be used to retrieve the trouble codes. Follow the scan tool manufacturer's instructions on how to connect the scan tool to the vehicle and how to retrieve the codes.


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Fig. Fig. 4: Engine diagnostic trouble codes (1 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles


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Fig. Fig. 5: Engine diagnostic trouble codes (2 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles


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Fig. Fig. 6: Engine diagnostic trouble codes (3 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles


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Fig. Fig. 7: Engine diagnostic trouble codes (4 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

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1 Answer

My 1999 pontiac sunfire 2.2 liters did not pass the e-test. I feel that something tells my computer to run rich at 2000 rpm. I changed the spark plugs and the air filter. After driving 200 Klm. the engin...


The code P0137 means that your downstream O2 sensor has low volts. A rich running engine makes the voltage go high, not low. If the upstream sensor is not reading a rich or lean condition, then you need to replace your downstream O2 sensor.

Dec 21, 2011 | 1999 Pontiac Sunfire

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1999 LS400 the vsc check engine light came on. Is this a serious problem? And how to fix it?


I have a 1999 LS400 an the VSC light was continually coming and finally I disconnected the battery over night and that reset it and haven't had anymore problems.

Aug 11, 2011 | 1998 Lexus LS 400

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97 pontiac sunfire 2.2L engine has trouble starting when engine is cool I have to give it a little gas to start it but when engine is hot starts just fine. Had fuel injector cleaned and a induction replace...


po141 code is downstream oxygen sensor heater or circuit fault. that should not keep it from starting cold...but cars are funny like that!!
i would get that fixed and go from there

May 27, 2011 | 1997 Pontiac Sunfire

1 Answer

How do I obtain and read the error codes on a 1991 Geo Tracker?


You must use a short jumper wire to ground the white diagnostic connector. This terminal is part of the Assembly Line Diagnostic Link (ALDL), located under the dash near the ECM. This is under the passenger side glove box behind the kick panel.

To activate the diagnostic codes, jump terminals 1 and 3 (the two outer terminals of the white connector). Then turn the ignition switch to on (engine not running). The check engine light will flash a code of 12 three times and then display the stored trouble codes.

To clear the codes, remove the ECM fuse for at least 10 seconds.

Mar 07, 2011 | 1991 Geo Tracker

1 Answer

How do i read the engine codes on a chevy 2500 1989 without a code reader


There should be an aldl (assembly line data link) plug under the drivers side of the dash. Ground the A and B terminals and turn the key to the run position. Count the number of times the check engine light flashes.

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1 Answer

Check engine light just came on


If the check engine light is on, then there is a code stored in it. To retrieve, get an OBD-II compliant scanner and read the codes. Clear it after that and see if it comes back. If it does, then read the codes again to see if they are the same.

One can go to autozone or advance auto parts and have the engine codes read for free. Otherwise, you can purchase your own scanner for under $100 from Sears or Walmart or Amazon.com, as examples.

Good luck on this repair babygirl3182.

Nov 06, 2010 | 2005 Pontiac Sunfire

1 Answer

Need radio code for 98 pontiac sunfire


Hi,

Thanks for writing to Fixya.com.

Please contact http://delcolockcodes.com/ and get the code within an hour. They charge something around 4$.

Thanks for contacting Fixya and please accept the solution if it has helped you.

May 25, 2010 | 1998 Pontiac Sunfire

1 Answer

Engine turns over, but will not start


gas line could be crushed or clogged up. but first try the battery might be dead try changing it, the starter could be messed up, or the ignition relay. try the relay before buying a starter. if at last the dont work i would have a code reader put on it and see if anything shows up the reading with cost u but will save some time

Mar 23, 2010 | 2005 Pontiac Sunfire

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