CEL code

When i got my car it had a few check engine light on it, i have slowly been knocking them out by myself and im down to the last one, dont know what it means but if you could tell me i would appreaciate it,
thanks _Alan

P0125
Clsd Loop Fuel Ctrl
Insufficient
Coolant Temp

what the fuck does this mean?

its not going into closed loop maybe?

Pimpin_IS wrote:

When i got my car it had a few check engine light on it, i have slowly been knocking them out by myself and im down to the last one, dont know what it means but if you could tell me i would appreaciate it,
thanks _Alan

P0125
Clsd Loop Fuel Ctrl
Insufficient
Coolant Temp

what the fuck does this mean?

That means your engine is running to cold thus running in closed loop mode. It's doing this because your ecu looks at coolant temperature to see if your o2 sensor is hot enough to give a accurate reading. How does your temp gage run? More then likely you need another t-stat.

Most O2 sensors have their own built in heaters. If the o2 sensor fails to heat up, the hot exhaust gas will kill the sensor thus making the car run in OPEN loop, which means the ecu does not use the o2 sensor to aid in fueling.
You can also test the ECT sensor to make sure it is getting the proper voltage. These specs can likely be found online or in the service manual if you have one. If you are not getting proper voltage at the ECT sensor, the ECU will not be able to give the proper fueling. During the startup process, the engine runs in open loop until the o2 sensor is heated and until you meet a specified coolant temperature threshold. Once you get to operating temperatures (roughly 190-200*F) the engine will switch to closed loop.

Start the car and use a multimeter to test its voltage. Narrow band o2 sensors run 0-1volt.

good luck.

thanks guys, appreaciate it