Billiebaba:
Your fan is it connected direct??

izaac23:
I greet you all my people
I drive a corolla 2004 model.
I had a misfire problem earlier which I later resolve it by servicing the fuel line altogether and it was resolved.
After that, my vehicle started having more power than it used to which I thought was a good sign, only for trouble code P0125 (insufficient coolant temperature for close loop fuel control) appeared.They can also monitor the O2 by checking the data stream by checking the fuel trim

I have tested my ECT sensor alias cold switch, confirm that my thermostat is still working, I don't know how to test the O2 sensor, the electricians at my location are not digitally inclined.

This has decreased my fuel economy by over 30%. The quantity of fuel that takes me for 100 miles distance is now taking me for 70 miles.

Pls gurus in the house, I need your help, wat else can I do to this car in this cheap fuel era, who knows wat trigger this code in a corolla? Help me pls.

Nomerci:
What's the idle rpm on at park,and what's it reading on neutral. Is it on 1500rpm at idle,I mean the slow,is it high or below 1k rpm at idle

izaac23:


At neutral and at park, the RMP is below one, and is steady, not fluctuating sir

Nomerci:
A bit low.should be like 1.2rpm.what have u diagnosed so far

sultaan:


idle is 650-700 rpm not 1200, 1200 is too high

sultaan:
If you drive the car long enough, maybe 15 minutes on the highway, and plug the scan tool, your coolant temperature should be reading about 190.

After driving a while is your fan running? that switch controls the fan

If your sensor is covered with rust and it is interfering with reading, or bad wiring.

Solution is to drive and when the car is hot and fan is running you use a thermostat to confirm the temperature is same as the reading of the engine coolant

Nomerci:
A bit low.should be like 1.2rpm.what have u diagnosed so far

Nomerci:
02 sensors maybe good look at the exhaust net,check for any charcoal black stain against the body of the net,a leaking exhaust flex net throws a false code to 02 sensors

sultaan:
If you drive the car long enough, maybe 15 minutes on the highway, and plug the scan tool, your coolant temperature should be reading about 190.

After driving a while is your fan running? that switch controls the fan

If your sensor is covered with rust and it is interfering with reading, or bad wiring.

Solution is to drive and when the car is hot and fan is running you use a thermostat to confirm the temperature is same as the reading of the engine coolant

jceesquare:

Try dey remember say this is a Nigerian forum boss and measurements should reflect same.
I believe you meant 190°F and not °C before person go cook him engine 😂.
Greetings sir.