Auto >> AutoSPT >  >> Engine

How do you reset a service engine soon light in 1990 Chevy 2500 truck?

You can't reliably reset a "Service Engine Soon" (SES) light on a 1990 Chevy 2500 simply by disconnecting the battery or similar tricks. These older trucks don't use the same OBD-II system as later vehicles, which allows for easy electronic clearing. The 1990 model likely uses a simpler system that stores codes differently.

To reset the SES light, you'll need to find and address the underlying problem causing it. Here's the proper approach:

1. Read the Diagnostic Trouble Codes (DTCs): This requires a scan tool specific to older GM vehicles. You'll likely need a code reader that works with the ALDL (Assembly Line Data Link) connector. This connector is usually located under the dashboard. Auto parts stores often have these readers available for rent or purchase.

2. Interpret the Codes: Once you have the codes, consult a repair manual for your specific 1990 Chevy 2500 truck. This will tell you what the codes mean and what potential problems they indicate.

3. Repair the Problem(s): This is the crucial step. Fix the mechanical or electrical issue that triggered the SES light. This could be anything from a faulty sensor (oxygen sensor, coolant temperature sensor, etc.) to a problem with the ignition system, fuel system, or emissions system.

4. After Repairing: After making the repair(s), start the truck and let it run for a short while. The SES light should go out automatically *if* the problem has been properly fixed. If the light stays on, there's either a persistent issue, or a problem with your repair. Repeat steps 1-3 until the light is extinguished.

Important Considerations:

* Don't just clear the codes without fixing the problem. Ignoring the SES light can lead to further damage to your engine.

* A repair manual is essential. It will help you diagnose the problem and perform the necessary repairs.

* If you're not comfortable working on your truck yourself, take it to a qualified mechanic. They'll have the tools and expertise to diagnose and fix the issue correctly.

Simply trying to reset the light without addressing the root cause is a waste of time and could potentially damage your engine. Focus on diagnosing and repairing the problem, and the light will clear itself.

Auto Repair
What would cause the front end on a 1994 Chevy Z71 with 6in lift and 35in tires to shake real hard when hitting bump in road or breaking all tie rod ball joint are new the? How do you replace a steering box on an E-150 1992 conversion van?
Car Care
Should VW Camper vans rule the Earth? Who is the actress in budget rental car commercial? Whats Under The Hood? Your Engine Explained
Engine
How do you get a stuck key out of the ignition? Where is the fuse panel on a 1995 Oldsmobile cutlass?
Electric Car
Is the 89 Oldsmobile delta 88 Fwd? How do you Recharge ac on 2001 Ford Focus? Is a 2008 and 2010 GMC Sierra exhaust the same?
Autopilot
Driverless Vehicle Ethics – Should We Care? Where is the crank position sensor located on trailblazer 2002?
Car Photos
Is the 2014 Lexus LX-570 front wheel drive rear or four drive? What should you do if back up into a parked car and were afraid to get out because it was strange dangerous area but want let the person know that hit their car? I ve a clear title to my vehicle with no liens can the dealer legally repo this car?