1998 dodge b3500 check engine light is on but scanner detects no codes any ideas what you should start checking?

just not so hot that you burn yourself. checking before you drive is O.K.

Should be off for oil, on for transmission fluid check.

Use an OBD code scanner to find out why the computer has turned on the check engine light.

The computer illuminates the "check engine" light when it detects a condition needing attention, such as a faulty sensor. The computer will FLASH the check engine light when the condition is significant and should be addressed immediately. You can purchase, rent or borrow a computer code scanner at most auto parts retailers such as Checker Auto Parts or Auto Zone.

13.5 to 15.5 volts with the engine idling.

needs put on a diagnostic scanner, that should put the light out

Use a code scanner to find out why the light is on.

It varies from one car to another. Some recommend checking it with the engine off, some with the engine running in park, some with the engine running in neutral, etc. The owners manual for the vehicle will tell you how it should be done on yours.

Check Engine lights ALWAYS mean that the computer has detected a problem and you should use a code scanner to read the stored codes and figure out what's wrong.

It means that the computer has stored a diagnostic code and you should connect a code scanner to determine what the code means. If you can't do it yourself, you should take it to a shop. When something goes wrong, typically with a sensor or other electronic device, the computer detects the fault and stores it for diagnostic purposes, but you need to read the code to find out what it means.

If the engine has seized, you are facing major repair bills - or getting a new engine. You should have been checking your oil level frequently to avoid this.

alright there is this thing called an OBDII scanner your local autozone should have one, and if your check engine light is on a code will come up in the scanner and they should be able to tell you what exactly is wrong with your truck. good luck

Each scanner has particular resolution, it should be specified in the owner's manual.

You need a tachometer to determine RPM. If this is a GM V8 motor, you should have 8 degrees BTDC with the vacuum advance unplugged.

If you are checking Alternator voltage, It should 12.8 volts to 14.3 with engine running. Battery voltage is 12.3---12.8 with engine off.

The check engine light will come on anytime the ECU detects a problem with the emission system. It should also come on when you start the vehicle and stay for a few seconds and then go out.

NO you can not. The idle is computer controlled and should NEVER be fooled with. If it won't idle right then you need to have the engine scanned with an engine scanner so you can get a ideal of what the problem might be.

yes, the engine should be running and warm when checking the trans fluid. careful where you put your fingers and don't get burnt on the exhaust shield. The dipstick ios located on the right hand side of a 3.5 L nice and tight like everything else under the hood!

Find out what's wrong with the engine. Use a code scanner to find out what diagnostic codes have been stored. That should give you an idea what's wrong, then fix the problem and the light should go out.

When the check engine light is on the computer has information that you should know. Connect a code scanner to find out why and most likely it will tell you what is causing the rich burn condition.

In the related links there should be an scanner.

use a code scanner to find out. You should be able to borrow an OBDII code scanner from an auto parts retailer in your area.

It usually means that the fault has not been cleard. Use a code scanner, read the code and repair the problem then you should be able to successfully clear the check engine light.

You should run a diagnostic tool on it to find out what's wrong. You can pick one up from minimania.com This diagnostic scanner will reset the light.

Either bring to auto parts store for checking or Use a voltmeter With engine off and a fully charged battery reading should be around 12.8 With engine running and a good alternator voltage should be 13.8-14.2