Please help P0125 code
Thread Starter
Driver School Candidate
Joined: Oct 2012
Posts: 3
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From: NC
1999 ES300 (p0125 code) please help
Does anyone know much about this code? I changed the thermostat, checked the coolant and erase the code and drove about 5 miles, the check engine light come on again with the same code.
Driver
Joined: Sep 2010
Posts: 126
Likes: 3
From: nj
Did you use a OEM thermostat with correct degree rating?... NEVER NEVER use lower rated T'stats
Is the engine getting up to normal operating temperature? If it is then you may have a bad coolant temperature sensor. If you have a scanner you can read the ECT that the PCM is recieving from the ECT sensor.
Another possibility could be a flakey O2 sensor. You can read the values of the O2 sensors with a scan tool.
Is the engine getting up to normal operating temperature? If it is then you may have a bad coolant temperature sensor. If you have a scanner you can read the ECT that the PCM is recieving from the ECT sensor.
Another possibility could be a flakey O2 sensor. You can read the values of the O2 sensors with a scan tool.
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