Go to Autozone and have them do a free check engine diagnostic. My 1999 had that problem. It is probably an EGR valve problem. Its a simple fix and helps with fuel efficency.
The check engine light on a 1999 Ford Ranger is between the full mark of the gas gauge and the left turn signal arrow
Take your 2002 Ford Ranger to the garage to get the engine checked.
A check engine light means you have a possible problem with the emission system , you should get the Ranger scanned for trouble codes to diagnose and repair the problem . Once the problem has been repaired the check engine light can be reset.
A flashing check engine light means an engine cylinder misfire has been detected
If the check engine light stays on , a malfunction with the emission control system has been detected , have your Ranger scanned for any trouble codes to diagnose and then repair the malfunction
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
If the check engine light is on, there's something wrong with the engine. Or, the computer is bad. One or the other. They don't set a light for no reason.
A check engine light means that a malfunction has been detected with the emission control system - if the check engine light does not go out ( sometimes the problem corrects itself and the light goes out ) have the Ranger scanned for trouble codes in order to diagnose and then repair the malfunction
When you turn the ignition key to the run position just before starting the vehicle the check engine light will light for a few seconds to check the bulb
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions. If the check engine light is flashing a misfire has been detected
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired