Emissions
#1
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Emissions
Hi,
I bought a 96 ls400 cheap. Turned out the reason was the engine was bad. I bought a used engine put it in with a friend. It runs great but I can't get rid of the codes. It throws up P0125 and P0135. One of them is something about the thermostat sensor. The other is an O2 sensor, bank 1 sensor 1 I think. I put in a new sensor (pre-cat) but the code is still there. Not sure what to do about the thermostat (I did put a new one in). My cats sound kind of hollow. Could bad cats be making these codes come up? Any suggestions? I'm on my last temporary tag and need to get it registered so I can either drive it or sell it. Thanks
I bought a 96 ls400 cheap. Turned out the reason was the engine was bad. I bought a used engine put it in with a friend. It runs great but I can't get rid of the codes. It throws up P0125 and P0135. One of them is something about the thermostat sensor. The other is an O2 sensor, bank 1 sensor 1 I think. I put in a new sensor (pre-cat) but the code is still there. Not sure what to do about the thermostat (I did put a new one in). My cats sound kind of hollow. Could bad cats be making these codes come up? Any suggestions? I'm on my last temporary tag and need to get it registered so I can either drive it or sell it. Thanks
#3
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I will check both of those options. Still curious if the O2 sensor before the cat (very close to the cat) could be affected by a bad cat? Thanks for the info.
#4
Lexus Test Driver
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As for the other code check thermostat and coolant level. Check for signs of corrosion when you disconnect the ECT. To test the ECT accurately, you would need to boil the sensor to 212F and check the resistance. But i would just change it.
#5
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Ok. I have read several posts on the Engine Coolant Temperature Sensor but I am still confused about where it is located on a 96 ls400. Can anyone help? A picture would be great. Thanks
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