on my '99 the code came back on the diag. for rear wheel speed sensor (the one in the rear diff)
There are many things that can cause this. Take it to a garage.
The check engine light on a 1999 Ford Ranger is between the full mark of the gas gauge and the left turn signal arrow
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inside the door panel
If the cause of the code was fixed the light would have gone off on its own.
There are several things that can cause your 1999 Ford Ranger to grind when you put it into gear. The most common cause is a lack of transmission fluid.
what cause the ac light to blink on a 1999 Toyota sienna
You have a 1999 Ford Ranger 3.0.
The alternator may be at fault. If you continue to drive that vehicle with the battery light on, you will get stuck. Drive to your closest auto parts store, they can test your charging system for you at no cost.
Yes it could.
O2Sensor.
The main compatible engine with a 1999 Ford Ranger would be a 4.0L Ford V6. A V8 engine would fit well as well, but uses a lot of gasoline when driving.