Have 1992 jeep cherokee 4.0. Starts running bad and check engine light comes on code check is 41, it has something to do with charging system. Just finished installing my new neutral safety switch and speed sensor and everything there working fine now. Any Ideas what causing jeep to run bad.

 

did u reset the ecu.

 

reset computer and pops up again every time.

 

Here's what it means..
Code 41-Charging system circuit-output driver stage for generator field does not respond properly to the voltage regulator control signal.

So sounds like it could be a voltage regulator issue within the alternator.

 

here's something else I found..

Open or short in the generator (alternator) field control (regulator) circuit. This indicates a problem with the charging circuit and the fault is set when the battery voltage from the ASD relay falls below 11.75 volts. Wiring, connectors, fuses, and the ASD relay should be checked. A shorted battery cell can also trigger this fault.