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I need to know how to erase the check engine light if possible without using diagnostic tool

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You fail to list the year. If it is OBD1 compliant try turning on the headlights, then disconnecting the negative battery post. turn off headlight switch and wait 5 minutes and reconnect the battery post. This will reset the ECU. If it is OBD2 compliant then the same procedure may work but you will have to give the transmission time to relearn the characteristics of your drivetrain after reconnecting the battery. Or you can just keep driving and if you have repaired the problem that set the light then after around 50-100 key on/off cycles the light will automatically reset. Of course if you do not repair the problem that set the code it will not go out. And even if you turn it off it will just come back on. So you have to repair the problem to get rid of the Check Engine light permanently.

Posted on Jun 04, 2010

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3 Answers

What is a scan tool


A scan tool allows for the OBD II (On Board Diagnostics) codes to be read from the engine computer in a car. These are common electronic diagnostics tools used by automotive technicians. They are usually used when a check engine light comes on to determine the error codes associated with the check engine light.


They almost always connect via a standard plug on the divers side under the dash.


Most automotive parts supplier will check a car with complementary service to determine the codes stored in a customers automobile.

Nov 21, 2015 | Cars & Trucks

Tip

The Check Engine Light - Basics!


Today's cars are controlled by a Powertrain Control Module (PCM), your engine's computer. To repair or modify your car's performance, you need a scantool to communicate with the PCM.

The Check Engine Light, the "Malfunction Indicator Light"or "MIL" for short, is on because your vehicle's computer self-diagnosed a fault that could cause your vehicle's emissions to increase. It doesn't necessarily mean your vehicle is polluting or has a serious problem, but it might. So the light is on to let you know something is amiss that needs your attention.

Trouble is, you don't know WHAT the trouble might be. It might be something that could lead to a break-down or cause expensive engine damage, or it might be something minor like a loose gas cap (yes, the on-board diagnostic on 1996 and newer cars can even detect a loose, missing or leaking gas cap).

There's no way to know what the problem is without talking to your vehicle's computer.

How do you do that? By plugging a diagnostic scantool into your vehicle's diagnostic connector, usually found under the dash near the steering column. These tools unlock the secrets that have turned on your Check Engine Light and tell you the nature of the problem.

Yet these tools are only the messenger. It's up to you to combine information from the tool with knowledge of how the electronic system in your engine works to make an accurate diagnosis.

Read on as I unleash more Automobile Diagnostic tips.

Cheers.

Sholly-NG

on Feb 24, 2010 | Toyota Camry Cars & Trucks

1 Answer

When I put my 1998 Pontiac Transport Montana into gear the ABS and TCS warning lights come on and stay on


The only way to know where the concern is would be to retrieve the trouble codes; without scan tool, this information not provided by the manufacturer.

Self-diagnosis procedures (with the diagnostic scan tool):
- With the ignition switch OFF, connect the diagnostic scan tool (Hi-scan pro) to the data link connector located under side of master vacuum in engine compartment.
- Make sure the ignition switch is in the on position, and then choose correct vehicle and model, proceed to diagnostic data link menu item.
- Choose the inspection item after initializing the unit.
- Press malfunction code detection No. 1 and diagnostic scan tool will display any malfunction code found.
Notice: A malfunction code is a four-digit number that is continuously output until the failure code is erased by the diagnostic scan tool.
- From the list of failure codes, verify the failed part and repair it according to self-diagnosis procedures.
- After repair, erase all malfunction codes stored in the ABS control unit by selecting inspection item (No. 4).

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 19, 2011 | Cars & Trucks

2 Answers

How do you reset abs sensor on kia sportage


The only way to know where the concern is would be to retrieve the trouble codes.

Without Scan Tool: this information not provided by the manufacturer.

Self-diagnosis procedures (with the diagnostic scan tool)
- With the ignition switch OFF, connect the diagnostic scan tool (Hi-scan pro) to the data link connector located under side of master vacuum in engine compartment.
- Make sure the ignition switch is in the on position, and then choose correct vehicle and model, proceed to diagnostic data link menu item.
- Choose the inspection item after initializing the unit.
- Press malfunction code detection No. 1 and diagnostic scan tool will display any malfunction code found. Notice: A malfunction code is a four-digit number that is continuously output until the failure code is erased by the diagnostic scan tool.
- From the list of failure codes, verify the failed part and repair it according to self-diagnosis procedures.
- After repair, erase all malfunction codes stored in the ABS control unit by selecting inspection item (No. 4).

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 17, 2011 | Cars & Trucks

2 Answers

How do you reset the service engine light?


Locate the diagnostic connector. On the 1997 Nissan Maxima the connector is located in the OBD2 standardized location under the driver-side dash, slightly to the right of the steering column. With the ignition key in the "OFF" position, plug the connector of the scan tool into the diagnostic connector of the car. Turn the ignition key to the run position but do not start the engine unless instructed to by the scan tool.

Turn the scan tool on and select "Global OBD2" from the main menu. Select "Diagnostic Trouble Codes" from the first sub-menu, and then "Read Trouble Codes" from the second sub-menu. Write down all listed codes and their descriptions before erasing them. This will save time if you must perform additional diagnostics.

Press the back button on the scan tool until the second sub-menu is displayed, and select "Erase Codes" or "Clear Codes," depending on the manufacturer of the scan tool. A message will appear asking you to confirm your desire to erase the codes and other stored data. Select "Yes". The scan tool will alert you when the codes have been erased.

Test drive the vehicle to verify the repair is complete. The 1997 Nissan Maxima on-board computer will run a series of tests on the systems in the vehicle, including emission control devices. To complete these tests you must take two test drives that include a variety of driving conditions, with a 2-minute cool-down between each test drive. If the service engine soon light does not come back on during these two test drives, you have completed the repairs and the reset.

Oct 25, 2010 | 1997 Nissan Maxima

1 Answer

Service engine soon light staying on


The "check engine" light is part of your car's so-called onboard diagnostics (OBD) system.

If the check-engine light comes on, here are some tips on what you should do:
  • Look for a serious problem that requires immediate attention. Check your dashboard gauges and lights for indications of low oil pressure or overheating. These conditions mean you should pull over and shut off the engine as soon as you can find a safe place to do so. On some cars, a yellow "check engine" means investigate the problem, while a red "check engine" means stop right now.
  • Try tightening your gas cap. This often solves the problem. Keep in mind that it may take several trips before the light resets. Some vehicles have a separate indicator that warns of a loose gas cap before the condition sets off the "check engine" light.
  • Reduce speed and load. If the "check engine" light is blinking or you notice any serious performance problems, such as a loss of power, reduce your speed and try to reduce the load on the engine. For example, it would be a good idea to stop towing a trailer. Have the car checked as soon as possible to prevent expensive damage.
  • Contact OnStar, if available. If you have a 1997 or later General Motors vehicle equipped with OnStar and an active OnStar subscription, contact an advisor who can read the trouble code remotely and advise you about what to do.
  • Have the code read and the problem fixed. If you want to diagnose the malfunction yourself, you can buy a scan tool at most auto parts stores. Prices range from about $40 to several hundred, depending on the model and the features. The tools come with instructions on how to hook them up and decipher the codes. But unless you have a good knowledge of automotive diagnostics, you're probably better off taking the vehicle to a professional. Some automotive parts stores will read and interpret the code for you without charge. Unless there is an easy fix, they may simply refer you to a mechanic.
  • Don't go for a state emissions test. In a late-model car, an illuminated "check engine" light probably is a sure sign your car will fail the test. In some states, it's an automatic failure, even if the problem was nothing more than a loose gas cap. By the way, don't bother trying to fool the inspection station by disconnecting the battery or using any other method to erase the trouble code and turn off the "check engine" light. Your vehicle's computer will let the inspection station know that its codes have been erased, and you'll just have to go back again.

Hope helps.

Jun 25, 2010 | 2001 Saturn SL

1 Answer

How to read engine cose 1990 ford escort 1.9


On board diagnostic (OBD) was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. No need buying a scanner or running to any parts stores to check the engine light. This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports.
Ford owners can check their check engine light using the diagnostic connector located at the engine compartment by the fender near the battery. Getting the obd1 codes need a couple of tools: a 4 inch long gage 16 jumper wire and a 12 volt test light. Both tools are hooked up to the diagnostic connector and when the IGNITION KEY is turned on (without starting engine) the codes will begin to flash in the test light, not in the dash panel. If there is no code, you will normally get code 11 or 111. On Fords, there are 2 test modes, the KOEO (key on engine off) and the KOER (key on engine running). Both test modes should be used to get the accurate evaluation of the stored fault codes.
Most of the codes can be erased or cleared by disconnecting the battery negative terminal for 1 minute and reconnect. Just make sure to check your service manual in case you have electronic equipment such as radio or clock that needs reprogramming in which battery disconnection is not recommended. Finally after performing repairs on the culprit code, always go for a road test to confirm if the problem is fixed.
http://www.troublecodes.net/Ford/88-951325.shtml

Nov 02, 2009 | 1990 Ford Escort

1 Answer

02 Jetta 2.0 Check Engine Light


Hi, only way to really know what the check engine light is for is to run a diagnostic check on the pcm using a OBD II diagnostics tool, you can buy one at most auto parts store's or if you don't want to spend the money on one some auto parts store's will do a diagnostics check on your vehicle for free, good luck.

Mar 29, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Check engine light is on. Can I drive it?


You have to take it to a mechanic. they will connect a machine to the car's cpu. the machine will find the problem that correspond with the diagnostic code in the car's cpu. you can drive the car but it all depends on the reason the check engine light came on. it could be a mechanical problem, or an electrical problem. one possibility is one of the sensors in the car may need replacing. if you want to turn the check engine light off without going to the mechanic all you have to do is disconnect the battery. this will erase the check engine light code in the car's cpu.

Aug 07, 2008 | 1991 Oldsmobile 88

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