Question about 1988 Oldsmobile Delta 88

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Code 21

Hi, I have ehe errorcode 21 online my 88. Hat tondo?

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4X4 Indicator lights not working at all no flashing or anything. Checked fuses and they are good unless there is another I don't know about. Also will not go into 4WD Hi or Low stays in 2WD.

Step by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC ...

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Jan 20, 2014 - Uploaded by rwdelling
Step by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC Truck ... flashing indicator lights and then would not shift from 2-4wd atall. .... 1997 2dr Tahoe in Nov and I've been having the same problems all winter. I was getting worried thinking I would have to pay a lot of money to get my 4WD working again.

Jan 03, 2016 | 1997 GMC Yukon

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Code 88

In reviewing the GM OBD I code list, there is no code 88
FAQ How to read older GM codes for free

Mar 23, 2014 | 1995 Cadillac DeVille

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95 dodge caravan se code 12 21 55

Well, the code 12 is telling you the battery or the computer has been disconnected in the last 50 starts, code 21 is a problem with the O2 sensor, and code 55 is telling you there are no more trouble codes stored in memory.
Code 21 means the O2 sensor is not switching from rich to lean, which can be a faulty sensor or a fuel problem.

Aug 28, 2012 | Dodge Caravan Cars & Trucks

2 Answers

I have a 1994 Oldsmobile Delta 88 Royale. The check engine light is on and when warm it dies while being driven. It will start back up immediately, but will die again after a short period. I have an Equus...

You can either take it to Advance Auto - Auto Zone or Pep Boys as these 3 do systems checks.

Try taking down the VIN# - call a dealer and ask about recalls or Service Bulletins.
Best of it

Gary @ Fix Ya

Aug 31, 2010 | 1994 Oldsmobile 88

1 Answer

Can't find the fuse box

There is one under the hood in a box ,with relays,the other one is ,or should be on drivers side at the end of the dash when the door is opened.

Jul 25, 2010 | 2002 Chrysler Town & Country

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I have a 1990 delta 88 and the engine light is on and i have a part to have the light blink to tell me whats wrong but dont kno the code how can i kno

the part is a paperclip. Inserted in A & B sockets of the diagnostic connector. You must then count the flashes. long flashes 1st, followed by short flashes. the longs indicate 10, the shorts are 1. so 2 longs and 3 shorts would be a code 23, 4 longs and 2 shorts would be a 42...etc etc. after the shorts finish, there will be a semi-long pause, then it will start flashing longs and shorts again. watch and count flasghes AGAIN carefully. if its the same as before, that is your only code. It MAY be a different number, meaning you have more than 1 code. count them long/short sequences 1 after another and write them down till you have them all saved. Then search them on the internet or repost them and if I happen to see it, I may be able to lead you further.

This work is usually done with expensive tools for a reason. flash codes are a basic and limited diag step...replacing parts based on what they tell you can waste hundreds of dollars if its not an obvious problem, so be careful before buying parts just because you get a code for o2 sensor rich or MAP sensor voltage high. Its not always the part mentioned in the code, that may in fact simply be the sensor alerting you it sees a mechanical problem and the sensor is in fact accurate. The car may BE rich, or there may BE a big vacuum leak...etc etc. If you arent comfortable with the troubleshooting, dont be afraid to take it to a professional.

Sep 15, 2009 | 1991 Oldsmobile 88

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Engine stalling

Hello doncoth...very low mileage for an 88 aries and i doubt that anything serious is going on.
In 88 these engines were carbureted, not fuel injected & majority of the stalling problems were fuel system related on these cars,
like a broken or split vacuum hoses allowing air to be sucked into the intake manifold. Unmetered air changes the fuel mixture, and can cause a stalling problem..
Since the check engine light is coming on we need to find out what the trouble codes are.
To get the codes, put the key in the ignition and turn the key to the "run" position until all the dash lights come on (DO NOT START) Have your paper and pen ready to take notes.
Turn key back "off",then to "run" again,"off" again and then back to "run " and leave it there.....The check engine light will begin flashing....It will flash a 2 digit code....For instance,2 blinks followed by a pause,then 1 more blink would be code "21"....The last code displayed will be 55 (test is over) From that information we can determine the cause of the condition. The codes can be read here>>>> the list is at the bottom of the page. Let me know what you find. I'll be glad to help you.
Good luck and i hope this helps.

May 23, 2009 | 1988 Dodge Aries

1 Answer

1991 hyundai scoupe codes

harness and connector OR (ECT) sensor
harness and connector OR (VSS) sensor


Jul 01, 2008 | Hyundai Motor 1991 Scoupe

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