UA-65274002-1

Jump to content


Photo
- - - - -

Check Engine Light, but Can't Pull the Codes


  • Please log in to reply
34 replies to this topic

#21 Mitchellman

Mitchellman

    Member

  • Members
  • PipPip
  • 43 posts
  • LocationDickeyville, WI

Posted 28 September 2017 - 03:13 AM

Do either of those places have the ALDL cable? It can be as simple as a wrong cable or the scan tool doesn't have the ability to go back to OBD1 without being programmed for it. I imagine this would be moreso true for the oriellys Bosch scanner. Most stores have a machine that will only go back to 96 for simplicity since they all use the same connector.

They both have the OBD1 connector adapter.

#22 Nas Escobar

Nas Escobar

    #1 Stunna

  • Members
  • PipPipPipPip
  • 3,666 posts
  • LocationDistrict of Columbia

Posted 29 September 2017 - 05:09 AM

They both have the OBD1 connector adapter.

Then yeah, I'd suggest research to see what you need to do to activate the feature. It may need definitions downloaded

2003 Pontiac Grand Am (01/12 - 08/13)

1994 Oldsmobile Cutlass Supreme

2002 Chevrolet Camaro (09/13 - 07/16)

1996 Infiniti G20

1993 Chevrolet Lumina Z34

1989 Buick Regal Limited (06/16 - 01/17)

1994 Chevrolet Cavalier RS

2009 Pontiac G6


#23 Schurkey

Schurkey

    Senior Member

  • Members
  • PipPipPipPip
  • 1,584 posts

Posted 30 September 2017 - 04:39 AM

IF (big IF) the scan tool has appropriate software to deal with the model and year you're working with, maybe you have a defect in the vehicle wiring.

 

Does the MIL come on when the key is turned to "Ignition" but before you crank the starter?

 

Have you verified the ECM fuse(s)?


"The most negative fricken troll ever." --Bee Twenty

#24 Mitchellman

Mitchellman

    Member

  • Members
  • PipPip
  • 43 posts
  • LocationDickeyville, WI

Posted 30 September 2017 - 05:30 PM

IF (big IF) the scan tool has appropriate software to deal with the model and year you're working with, maybe you have a defect in the vehicle wiring. Does the MIL come on when the key is turned to "Ignition" but before you crank the starter? Have you verified the ECM fuse(s)?

The Bosch Scanner at Oriellys had the make and model, but not appropriate software to recognize it. Couldn't get any codes from that one. Borrowed an older Matco Tools Determinator Scanner and got the Codes in less than a minute. Simple O2 and EGR codes were all that was present at the time I checked. Going to keep an eye on it and see if any more codes pop up. And of course, resolve these codes.
  • Nas Escobar likes this

#25 Nas Escobar

Nas Escobar

    #1 Stunna

  • Members
  • PipPipPipPip
  • 3,666 posts
  • LocationDistrict of Columbia

Posted 30 September 2017 - 07:23 PM

I would change the O2 sensor and clean out the EGR. One of the solenoids may be sticking. 


2003 Pontiac Grand Am (01/12 - 08/13)

1994 Oldsmobile Cutlass Supreme

2002 Chevrolet Camaro (09/13 - 07/16)

1996 Infiniti G20

1993 Chevrolet Lumina Z34

1989 Buick Regal Limited (06/16 - 01/17)

1994 Chevrolet Cavalier RS

2009 Pontiac G6


#26 Dark Ride

Dark Ride

    Senior Member

  • Members
  • PipPipPipPip
  • 1,260 posts

Posted 02 October 2017 - 12:09 AM

Yup I would treat the egr problem first. The O2 code could be set by the ecm being unable to lean or richen the mixture from a stuck egr valve. Not that the o2 sensors are too expensive to replace anyway.
  • Nas Escobar likes this
-Mitch Reed 1998 Grand Prix GTP Supercharged A Few Mods 1990 Turbo Grand Prix Project Car 1995 Chevy Lumina Winter Beater, Complete with no OD mod

#27 Nas Escobar

Nas Escobar

    #1 Stunna

  • Members
  • PipPipPipPip
  • 3,666 posts
  • LocationDistrict of Columbia

Posted 08 October 2017 - 06:11 PM

Yup I would treat the egr problem first. The O2 code could be set by the ecm being unable to lean or richen the mixture from a stuck egr valve. Not that the o2 sensors are too expensive to replace anyway.

 

20 year old car, it wouldn't hurt to change the o2 sensor. If the EGR has carbon buildup, the o2 sensor may be faulty from caked on carbon.


2003 Pontiac Grand Am (01/12 - 08/13)

1994 Oldsmobile Cutlass Supreme

2002 Chevrolet Camaro (09/13 - 07/16)

1996 Infiniti G20

1993 Chevrolet Lumina Z34

1989 Buick Regal Limited (06/16 - 01/17)

1994 Chevrolet Cavalier RS

2009 Pontiac G6


#28 Dark Ride

Dark Ride

    Senior Member

  • Members
  • PipPipPipPip
  • 1,260 posts

Posted 08 October 2017 - 07:24 PM

20 year old car, it wouldn't hurt to change the o2 sensor. If the EGR has carbon buildup, the o2 sensor may be faulty from caked on carbon.

Very true
-Mitch Reed 1998 Grand Prix GTP Supercharged A Few Mods 1990 Turbo Grand Prix Project Car 1995 Chevy Lumina Winter Beater, Complete with no OD mod

#29 Mitchellman

Mitchellman

    Member

  • Members
  • PipPip
  • 43 posts
  • LocationDickeyville, WI

Posted 09 October 2017 - 12:48 AM

I have to look deeper into it which O2 it's coding for. I replaced one of the O2s 3 years ago and EGR is only 4 years old, but will definitely pull it off and clean everything.

#30 Dark Ride

Dark Ride

    Senior Member

  • Members
  • PipPipPipPip
  • 1,260 posts

Posted 09 October 2017 - 02:45 PM

Did th e obd 1.5s have two o2 sensors? FWIW the O2 behind the cat just tells the computer the cat is functioning, it doesn't affect performance.
-Mitch Reed 1998 Grand Prix GTP Supercharged A Few Mods 1990 Turbo Grand Prix Project Car 1995 Chevy Lumina Winter Beater, Complete with no OD mod

#31 vipmiller803

vipmiller803

    Advanced Member

  • Contributing Member
  • 291 posts
  • LocationDetroit, MI

Posted 09 October 2017 - 02:58 PM

Did th e obd 1.5s have two o2 sensors? FWIW the O2 behind the cat just tells the computer the cat is functioning, it doesn't affect performance.

yes


1995 Buick Regal Custom 2DR - 3.8L - DD - 4th Engine, 3rd Transmission, and counting...

1993 Jeep GC LTD - 4.0L - Snow Days Ride

1999 Grand Am SE - 2.4L - Sold


#32 oldmangrimes

oldmangrimes

    Member

  • Contributing Member
  • 127 posts

Posted 09 October 2017 - 05:40 PM

I'm curious to hear what your solution ends up being. 

 

I've also got an OBD 1.5 car, and don't have a scanner.   Amazingly, I haven't needed one yet, my car's got 220k and showed it's first Check Engine Light recently.    My car runs and idles fine, just a slight mpg drop.   I changed my upstream O2 sensor first, just because I think it was original and was overdue to be changed but it didn't help.  Next I'll try to clean the EGR, hopefully that works and I don't have to buy a new one.    If cleaning your EGR works, please share your method of cleaning.   



#33 Imp558

Imp558

    Proud TransCelestialsexual

  • Contributing Member
  • 3,465 posts
  • LocationErie PA.

Posted 09 October 2017 - 05:48 PM

A volt meter will test most of the sensors

Banner.jpg

 

"If everything seems under control, you're not going fast enough"  - Mario Andretti

 

1996 Regal L67/4T65E-HD swapped

1980 Dodge Sno-Commander

1984 Dodge Prospector

1968 Empi Imp on '67 Pan


#34 Schurkey

Schurkey

    Senior Member

  • Members
  • PipPipPipPip
  • 1,584 posts

Posted 09 October 2017 - 07:35 PM

A volt meter will test most of the sensors

Largely true.  It will take all day.  You will need to pierce the wire harness unless you've got a fistful of adapters, or a breakout box.   If you pierce the harness, you can expect it to corrode eventually.  Sealing the hole with silicone or electrical tape seems to slow the corrosion some.

 

A scan tool will do it in fifteen minutes, from the comfort of the driver's (or passenger) seat.

 

If you're working on a computer-controlled vehicle, you owe it to yourself to buy a computer-interface tool (Scan tool.)


"The most negative fricken troll ever." --Bee Twenty

#35 Imp558

Imp558

    Proud TransCelestialsexual

  • Contributing Member
  • 3,465 posts
  • LocationErie PA.

Posted 09 October 2017 - 07:42 PM

It's rarely if not never necessary to nick a wire, a simple straight pin or safety pin will slide under the seal at the plug and make contact with the pin inside. I'm not a professional mechanic, but I am a professional diagnostician and a lot of shops call me when they can't figure stuff out
  • oldmangrimes likes this

Banner.jpg

 

"If everything seems under control, you're not going fast enough"  - Mario Andretti

 

1996 Regal L67/4T65E-HD swapped

1980 Dodge Sno-Commander

1984 Dodge Prospector

1968 Empi Imp on '67 Pan





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users