what is: warning light ON

Showing posts with label warning light ON. Show all posts

Saturday, October 13, 2012

overdrive light come on and off

The problem noticed on 2001 Ford Explorer.

The overdrive lights goes on and off on dash board.

This case is related to transmission or with gear issue.

Sometimes its just a basic warning to get the vehicle fluid level checked.

But the best possible way to get the problem confirmed is get the transmission module scanned.This will tell what problem is there.In scanning the error codes are retrieved and as per that further troubleshooting is done.

On these particular case the problem was related to faulty 2nd and 5th gear and replacing the gears solved the issue and overdrive light is gone out.
Also the present condition of transmission is not very good.So its advisable to get the transmission rebuilt by proper transmission professionals.

But the ford was running fine with same transmission,so customer was not interested in replacing the complete transmission.

These details will help.
Thanks.

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Sunday, June 10, 2012

Service engine soon Light Turned OFF after Jump Start?

The reason the light went out after the jump start, is because when the system loses battery voltage, the "clears" the trouble codes from the on-board computer. Once the computer "re-boots" itself, and re-checks all the systems, it will see the fault again, and re-set the Check Engine light. So, it's the same problem, it just took the on-board computer a little bit to re-evaluate the problem after the power loss.

Actually, When the Check Engine light comes on or Service engine soon light comes up, this is the Engine ECM way of telling you there is a problem in one of the monitored systems. Unfortunately, there are literally number of parts and sensors monitored in various systems, and to take a "guess" as to which part/sensor in which system is faulty, is virtually impossible.

However, if you are not experiencing any drivability issues such as skipping, stalling, shifting problems, etc, then more than likely, the problem is going to lie in the EVAP (emissions) system.

Very commonly in many such cases, this could be a faulty, loose or missing fuel cap or even putting fuel in while the vehicle is running.
So to test/inspect the problem

Check the cap for any cracks in the rubber o-ring on the underside.
Check the fuel filler neck for any signs of chips or debris.
Check under the vehicle, around the area of the fuel tank and the EVAP canister looking for any vacuum lines that have dry-rot cracks, holes or loose/missing connections.

If these all check out, then the best thing to do at this point is to have the "p-codes" read from the on-board computer. There are 4 digit P codes stored in vehicles computer.
These p-codes are what is used as a "starting point" for the diagnosis and will tell which part/sensor in which system has the fault.
There isn't a Mechanic on the planet that can tell you what is wrong with the vehicle just by "looking" at the Engine Light. Every single Mechanic's first course of action WILL be to obtain the p-codes. Once you get these p-codes you can more accurately and efficiently diagnose the problem and then make the repair. You can have these p-codes read FREE (except in California) at any local "big chain" part store (ie. AutoZone, PepBoys, Advanced, etc).

Once you receive the P-codes,you can troubleshoot the problem further with help of this P-codes.

This details will help.
Thanks.

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http://schematicsdiagram.blogspot.in/2012/02/toyota-camry-check-engine-light-flashes.html

Car jerks while going uphill and Check engine light is ON?

http://schematicsdiagram.blogspot.com/2011/12/car-jerks-while-going-uphill-and-check.html

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Check Engine Light ON?

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Intermittent Check Engine Light?

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FREE Car repair guide?
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http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Friday, June 1, 2012

2003 Pontiac Grand AM: System Security Light Is ON?

The Security light comes ON,if there is problem with Key or Anti theft control module.

There is a reset procedure.This procedure helps many a times.Before inspecting or replacing Any part.Its advisable to try System re-learn procedure.

The procedure is as follows:----

Its the 30 minute relearn procedure:

1-Turn ON the ignition, with the engine OFF.
2-Attempt to start the engine, then release the key to ON (vehicle will not start).
3-Observe the SECURITY telltale(this is the security light), after approximately 10 minutes the telltale will automatically turn OFF.
4-Now Turn OFF the ignition with Key, and wait 5 seconds .

5-Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the Passlock(TM) Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).
IMPORTANT NOTE: The vehicle learns the Passlock(TM) Sensor Data Code and/or password the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

6-Start the engine (the vehicle has now learned the Passlock(TM) Sensor Data Code and/or password).

IF the light still stays on then it is most likely the key, but may be the anti-theft control module, so before purchasing a key, I would have it scanned to make sure it is the key and not the module:
This procedure and details will help.
Thanks.

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