P0712 I know it says trans fluid temp sensor low input but what does this mean and how do 'i fix

no year car, no engine size, no transmission name , nor country
my guess this tranny A/t , fails 3 >4 shift/ that it?
fails to shift or shifts up and FLARE (aka false neutrals)
not told the problem at all just parts changed wrong
there are 50 causes (seals old and bad and leak vast)
and 20 or more bad symptoms on a failing tranny
FUN CARGO ,2 words called in JAPAN
Toyota Yaris Verso 2002 to 2004?
SCAN THE PCM YET/? p07XX ERRORS
I try to buy it on world market and see this.
TRANS UA-NCP25, (car code name)
TRANSVERSE BOX FWD.
BASE TRANS, AISIN, U340F-04A

THERE ARE MANY TEST. FOR ANY A/T
1: AFT not burnt, not overfilled or under
2: scans show what is wrong/ not scanned is no good.
3: line pressure port tested for a PSI in all shifted gears PRNDL.
4: if EBOX. , 3>4 solenoid bad, (not shifting to 4th)
5: PCVS some have pressure control valve, Ebox, to set or trim main line pressure. (as in modulated)
5a and newer have gear pressure detector switches.that can all fail if above fails.
6: all speed sensord good but the scans told you that if you looked.
7: endless leaks causes #3 to fail sure. its 20 years old why not?
maker AISIN , bet 1.
and some version of A340 but not told. ending in E,F,H,S
8:heat sensor in box (Ebox) that cause limphome mode to cool it down.does box work COLD"?
S code s Tip-tronic box,suffix code
my answer is mostly 2002 year, but NOT TOLD. U

a340f codes common
P0710 Transmission Fluid Temperature Sensor Circuit P0712 Transmission Fluid Temperature Sensor Circuit Low Input P0713 Transmission Fluid Temperature Sensor Circuit High Input P0722 Output Speed Sensor Circuit No Signal P0751 Shift Solenoid 'A' Performance or Stuck Off P0756 Shift Solenoid 'B' Performance or Stuck Off P2716 Pressure Control Solenoid ?D? Electrical P2740 Transmission Fluid Temperature Sensor B Circuit P2742 Transmission Fluid Temperature Sensor B Circuit Low top fix any trans, learn exactly what is there first
not guess, learn that, or even read its side plate tag
huge evolution 2000 to now, for sure new pressure control
modulated solenoids and 2 or 3 speed sensors.
Any car made,if has EBOx, (means TCM brain shifted )
must be scanned first after levels ATF correct hot.

Temp sensors are known to go bad and also the inner wiring harness of the transmission have been known to fail under high heat.

Follow the link for an explanation of this fault code. P0712 Transmission Fluid Temperature Sensor Circuit Low Input

P0700 Transmission Control System

P0701 Transmission Control System Range/Performance

P0702 Transmission Control System -Electrical

P0703 Torque Converter/Brake Switch B Circuit

P0704 Clutch Pedal Position Switch -Circuit Malfunction

P0705 Transmission Range Sensor/Switch Circuit Malfunction (PRNDL Input)

P0706 Transmission Range Sensor/Switch Circuit Range/Performance

P0707 Transmission Range Sensor/Switch Circuit Low Input

P0708 Transmission Range Sensor/Switch Circuit High Input

P0709 Transmission Range Sensor/Switch Circuit intermittent

P0710 Transmission Fluid Temperature Sensor Circuit

P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance

P0712 Transmission Fluid Temperature Sensor Circuit Low Input

P0713 Transmission Fluid Temperature Sensor Circuit High Input

P0714 Transmission Fluid Temperature Sensor Circuit Intermittent

P0715 Input/Turbine Speed Sensor Circuit

P0716 input/Turbine Speed Sensor Circuit Range/Performance

P0717 Input/Turbine Speed Sensor Circuit No Signal

P0718 Input/Turbine Speed Sensor Circuit Intermittent

P0719 Torque Converter/Brake Switch B Circuit Low

P0720 Output Shaft Speed Sensor Circuit

P0721 Output Shaft Speed Sensor Circuit Range/Performance

P0722 Output Shaft Speed Sensor Circuit No Signal

P0723 Output Shaft Speed Sensor Circuit Intermittent

P0724 Torque Converter/Brake Switch B Circuit High

P0725 Engine RPM Input Circuit

P0726 Engine RPM Input Circuit Range/Performance

P0727 Engine RPM Input Circuit No Signal

P0728 Engine RPM Input Circuit Intermittent

P0729 Gear 6 Incorrect Ratio

P0730 Incorrect Gear Ratio

P0731 Gear 1 Incorrect Ratio

P0732 Gear 2 Incorrect Ratio

P0733 Gear 3 Incorrect Ratio

P0734 Gear 4 Incorrect Ratio

P0735 Gear 5 Incorrect Ratio

P0736 Reverse Incorrect Ratio

P0737 TCM Engine Speed Output Circuit

P0738 TCM Engine Speed Output Circuit Low

P0739 TCM Engine Speed Output Circuit High

P0740 Torque Converter Clutch Solenoid Circuit

P0741 Torque Converter Clutch Solenoid Circuit Performance or Stuck Off

P0742 Torque Converter Clutch Solenoid Circuit Stuck On
P0743 Torque Converter Clutch Solenoid Circuit Electrical
Now i dont know a lot about automatics especially modern ones with all this fancy electronics thats used nowdays but i think its a fault with the temperature sensor for the gearbox.But where its located and what it looks like i have no idea it could even be mounted inside the gearbox .Sorry not a very good answer from a mechanic but?? very few of our europeon cars come with auto transmission .Evan when i do know whats wrong i cannot buy the parts for the gearbox as only re-con boxes supplied by the dealer so best advice is to try a specialist in auto box repairs only .PS some of my best students when i used to teach mechanics many moons ago were the girls so no excuses like iam only a girl please

the meaning of codes 41 and 58 is:

DTC - 41 Ignition control error

DTC - 41 MEM- CAL error
DTC - 41 Cam sensor sinal error

DTC - 58 Trans fluid temp sensor circuit error (low voltage)
DTC - 58 VATS System error

I hope this is helpful

I would get a second opinion.
Code 713 means the temp sensor is not sending a signal to the computer to tell it what the trans fluid temp is.
The sensor should be on top of the transmission under the air cleaner.
Most any shop should be able to replace it in less than an hour.
They should test it first to make sure the problem is not in the wiring harness.
About the only way the transmission would be junk is if it had overheated which I doubt has happened.
Again, get a second opinion.

This would mean (a) the transmission fluid temp sensor is bad, or (b) the computer is bad, or
(c) the connector or wires to the sensor have corroded/been damaged somehow.

Definition of your code:
P0712 Transmission Fluid Temperature Sensor Circuit Low Input

which means that the voltage coming from the sensor is read by the computer as too low,
which also means that it could be zero. Zero voltage can happen if the transmission fluid temperature
sensor connector has been unpluged, or one of the wires to the sensor have been cut/damaged/corroded.
If there has been recent repair activity to the car, then its possible that this sensor's wires or
connector has been disconnected/cut/damaged somehow.

P0700 Transm.Contr.System Malfunction 17084
P0702 Transm.Contr.System Electrical 17086
P0703 Torque Converter/Brake Switch B Circ Malfunction 17087
P0705 Transm.Range Sensor Circ.(PRNDL Inp.) Malfunction 17089
P0706 Transm.Range Sensor Circ Range/Performance 17090
P0707 Transm.Range Sensor Circ Low Input 17091
P0708 Transm.Range Sensor Circ High Input 17092
P0710 Transm.Fluid Temp.Sensor Circ. Malfunction 17094
P0711 Transm.Fluid Temp.Sensor Circ. Range/Performance 17095
P0712 Transm.Fluid Temp.Sensor Circ. Low Input 17096
P0713 Transm.Fluid Temp.Sensor Circ. High Input 17097
P0715 Input Turbine/Speed Sensor Circ. Malfunction 17099
P0716 Input Turbine/Speed Sensor Circ. Range/Performance 17100
P0717 Input Turbine/Speed Sensor Circ. No Signal 17101
P0721 Output Speed Sensor Circ Range/Performance 17105
P0722 Output Speed Sensor Circ No Signal 17106
P0725 Engine Speed Inp.Circ. Malfunction 17109
P0726 Engine Speed Inp.Circ. Range/Performance 17110
P0727 Engine Speed Inp.Circ. No Signal 17111
P0730 Gear Incorrect Ratio 17114
P0731 Gear 1 Incorrect Ratio 17115
P0732 Gear 2 Incorrect Ratio 17116
P0733 Gear 3 Incorrect Ratio 17117
P0734 Gear 4 Incorrect Ratio 17118
P0735 Gear 5 Incorrect Ratio 17119
P0740 Torque Converter Clutch Circ Malfunction 17124
P0741 Torque Converter Clutch Circ Performance or Stuck Off 17125
P0748 Pressure Contr.Solenoid Electrical 17132
P0750 Shift Solenoid A malfunction 17134
P0751 Shift Solenoid A Performance or Stuck Off 17135
P0752 Shift Solenoid A Stuck On 17136
P0753 Shift Solenoid A Electrical 17137
P0756 Shift Solenoid B Performance or Stuck Off 17140
P0757 Shift Solenoid B Stuck On 17141
P0758 Shift Solenoid B Electrical 17142
P0761 Shift Solenoid C Performance or Stuck Off 17145
P0762 Shift Solenoid C Stuck On 17146
P0763 Shift Solenoid C Electrical 17147
P0768 Shift Solenoid D Electrical 17152
P0773 Shift Solenoid E Electrical 17157
P0790 Normal/Performance Switch Circ Malfunction 17174

P0700 Transm.Contr.System Malfunction 17084
P0702 Transm.Contr.System Electrical 17086
P0703 Torque Converter/Brake Switch B Circ Malfunction 17087
P0705 Transm.Range Sensor Circ.(PRNDL Inp.) Malfunction 17089
P0706 Transm.Range Sensor Circ Range/Performance 17090
P0707 Transm.Range Sensor Circ Low Input 17091
P0708 Transm.Range Sensor Circ High Input 17092
P0710 Transm.Fluid Temp.Sensor Circ. Malfunction 17094
P0711 Transm.Fluid Temp.Sensor Circ. Range/Performance 17095
P0712 Transm.Fluid Temp.Sensor Circ. Low Input 17096
P0713 Transm.Fluid Temp.Sensor Circ. High Input 17097
P0715 Input Turbine/Speed Sensor Circ. Malfunction 17099
P0716 Input Turbine/Speed Sensor Circ. Range/Performance 17100
P0717 Input Turbine/Speed Sensor Circ. No Signal 17101
P0721 Output Speed Sensor Circ Range/Performance 17105
P0722 Output Speed Sensor Circ No Signal 17106
P0725 Engine Speed Inp.Circ. Malfunction 17109
P0726 Engine Speed Inp.Circ. Range/Performance 17110
P0727 Engine Speed Inp.Circ. No Signal 17111
P0730 Gear Incorrect Ratio 17114
P0731 Gear 1 Incorrect Ratio 17115
P0732 Gear 2 Incorrect Ratio 17116
P0733 Gear 3 Incorrect Ratio 17117
P0734 Gear 4 Incorrect Ratio 17118
P0735 Gear 5 Incorrect Ratio 17119
P0740 Torque Converter Clutch Circ Malfunction 17124
P0741 Torque Converter Clutch Circ Performance or Stuck Off 17125
P0748 Pressure Contr.Solenoid Electrical 17132
P0750 Shift Solenoid A malfunction 17134
P0751 Shift Solenoid A Performance or Stuck Off 17135
P0752 Shift Solenoid A Stuck On 17136
P0753 Shift Solenoid A Electrical 17137
P0756 Shift Solenoid B Performance or Stuck Off 17140
P0757 Shift Solenoid B Stuck On 17141
P0758 Shift Solenoid B Electrical 17142
P0761 Shift Solenoid C Performance or Stuck Off 17145
P0762 Shift Solenoid C Stuck On 17146
P0763 Shift Solenoid C Electrical 17147
P0768 Shift Solenoid D Electrical 17152
P0773 Shift Solenoid E Electrical 17157
P0790 Normal/Performance Switch Circ Malfunction 17174

crankshaft position sensor is a must. will not run when it goes out. the temp sensor is also a high priority.