My check engine light came on?

Will it cause damage to my truck if I drive it and could it be just bad gas, also the last fill up I put a gas treatment in it would that have caused it?

I have a 2000 ford ranger 4.0 scan says bank 2 sensor 1 oxygen sen bad I changed passenger side and 1 after catalytic converter still no luck new air filter new plugs n wires at 60000 miles had 2 replace heads and intake manifold gasket it has 84000 miles now.

Don't know what to do need some advise :-)

I have a 05 Ranger 3.0 V6. Rough idle and loss of power and pulling the same exact code after me replacing plugs, wires, coils and fuel filter. Before spending money on converter I took to Ford Dealer and have it diagnosed and making sure it is the converters, Result ended in being 2 stuck valves on drivers side that was causing the problem. Not sure how your truck is running, but the codes I have in it are same as yours.

Engine problem
2000 Ford Ranger 6 cyl Four Wheel Drive Automatic 137k miles

my check engine light came on and I went to Checkers. I ran the tester and it said I have insufficiant coolant temp. Code 0125. I was wondering what I can do? Do I put more coolant in my radiator, I am not sure if one of my sensors is out

I cant' use a code reader to fix my truck. They don't work. I bought one, tried two more to no avail. In the last tank of gas, truck idles rough, accellerates roughly in easy mode, but smooths up in hurried mode. Decelerates just fine. Put in Heet to dry out possible bad gas, no change. Just replaced fuel filter, no change. Now, I suspect short in ignition or battery wiring because of code reader failing to read. Ever hear of such a thing?

Is that the same plug the scanner goes into? In-line fuse or something I can find in the fuse panel? Thanks, Sir Tim.

A quick check of battery voltage revealed it was down to 12.2V, a full volt low, with a working regulator. Knowing it was 7 years old, I replaced it and all the troubles have vanished. Strange since it always started, lights were never dim, but I did put on two new battery cable terminals that could have been corroding on the inside and acting like big resistors, except under full acceleration. Strange, but cured. Don't know if it will accept a code reader or not yet, but back on the road and smooth running. Thanks for your help.

Hi my ford ranger 4cyl 2.5l just had a fuel pump replaced and ran great last night but today it has a rough idle when stopped and blinking cel that comes on and off. Any idea on what to do now?

My Ranger has the abs light on, the check engine light on and the o/d light flashes. I have replaced the speed sensor located on the rear differential and the lights are still on.

My engine check light is on, when I took it in for dionostic they told me it was due to a gas cap failure, is this posible?

My ABS light came on and my speedometer stoped working whe the speed was under 40 Miles per hour, My friend told me its a easy problem to fix just replace ther rear speed sensor, It took me 15 miinutes to do the job all went great, I took the truck on a test drive as soon as I started it it was great to see the ABS light off and when I hit the road my speedometer was working like a champ, but the Check engine light came on as soon as I started the truck and wont go off. Please provide me with any comments thank you so much
Andy K