1999 LS400 Problem with code po125
#1
1999 LS400 Problem with code po125
when I bought this LS, the CEL was on.
and the readout was
check coolant level
thermostat defective
ECT (engine coolant temperature) sensor defective
SO: I replaced the stat - and it was faulty
I replaced the ECT sensor
and verified that the coolant level was ok.
the light was off.. 2-3 weeks, then it is on again
and the readout is:
coolant temp is always low
explanation.
the power train control module verifies that the engine is at a proper operating temperature.
probable cause:
check coolant level
thermostat defective
ECT (engine coolant temperature) sensor defective
AND this has all been done...
Can anyone shed some light on this, I need for the dash temp reading to be just a little higher.
any ideas??
and the readout was
check coolant level
thermostat defective
ECT (engine coolant temperature) sensor defective
SO: I replaced the stat - and it was faulty
I replaced the ECT sensor
and verified that the coolant level was ok.
the light was off.. 2-3 weeks, then it is on again
and the readout is:
coolant temp is always low
explanation.
the power train control module verifies that the engine is at a proper operating temperature.
probable cause:
check coolant level
thermostat defective
ECT (engine coolant temperature) sensor defective
AND this has all been done...
Can anyone shed some light on this, I need for the dash temp reading to be just a little higher.
any ideas??
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#8
Lexus Fanatic
iTrader: (1)
There is a second one lower down lower for the ecu.
https://www.clublexus.com/forums/6669438-post34.html
https://www.clublexus.com/forums/6669438-post34.html
Last edited by Lavrishevo; 04-07-13 at 10:15 AM.
#9
There is a second one lower down lower for the ecu.
https://www.clublexus.com/forums/6669438-post34.html
https://www.clublexus.com/forums/6669438-post34.html
but I have found 7. INSTALL ECT SWITCH FOR A/C COOLING FAN
(a) Install a new O–ring to the ECT switch.
(b) Apply soapy water to the O–ring.
(c) Install the ECT switch.
Torque:7.4 N·m (75 kgf·cm, 65 in.·lbf)
this is in the bottom of the radiator and is for the fans.. not the dash gauge (I think)
#10
Lexus Champion
the ECTS has 2 wires, the gauge sender has 1 wire. - they are located right beside each other
did you install the thermostat with the burp hole positioned up?
did you use the real OEM ECTS from the Toyota or else the NTC (OEM) one from ebay?
is there a short or open in the ECTS wiring between the ECTS and the ECU connector? (look at yamae's guide to checking for ripple)
did you install the thermostat with the burp hole positioned up?
did you use the real OEM ECTS from the Toyota or else the NTC (OEM) one from ebay?
is there a short or open in the ECTS wiring between the ECTS and the ECU connector? (look at yamae's guide to checking for ripple)
#11
the ECTS has 2 wires, the gauge sender has 1 wire. - they are located right beside each other
did you install the thermostat with the burp hole positioned up?
did you use the real OEM ECTS from the Toyota or else the NTC (OEM) one from ebay?
is there a short or open in the ECTS wiring between the ECTS and the ECU connector? (look at yamae's guide to checking for ripple)
did you install the thermostat with the burp hole positioned up?
did you use the real OEM ECTS from the Toyota or else the NTC (OEM) one from ebay?
is there a short or open in the ECTS wiring between the ECTS and the ECU connector? (look at yamae's guide to checking for ripple)
yes the jiggle is at 12 oclock
NO I already said I got it at oreilly..
I WILL look for the 1 wire solenoid for the gauge and get one!!
thanks.... if you were not so ugly I would hug your neck (smile) if this works!!
#12
Lexus Champion
the gauge sender, in and of itself, cannot generate a code, it has no connection to the ECU, however I would use the REAL Toyota gauge sender, you need *accurate* info if your car is running too hot or cold
the real Toyota gauge sender is only $15
"it's the stingy man who spends the most"
- Click & Clack, the Tappet Brothers, Car Talk
the real Toyota gauge sender is only $15
"it's the stingy man who spends the most"
- Click & Clack, the Tappet Brothers, Car Talk
Last edited by LScowboyLS; 04-07-13 at 08:28 PM.
#13
the gauge sender, in and of itself, cannot generate a code, it has no connection to the ECU, however I would use the REAL Toyota gauge sender, you need *accurate* info if your car is running too hot or cold
the real Toyota gauge sender is only $15
"it's the stingy man who spends the most"
- Click & Clack, the Tappet Brothers, Car Talk
the real Toyota gauge sender is only $15
"it's the stingy man who spends the most"
- Click & Clack, the Tappet Brothers, Car Talk
OH, by the way, my dad and his family came from Sand Mountain, poor share croppers. lot of powell's up there. where are you?
Last edited by billydpowe; 04-08-13 at 07:26 AM.