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eyob07
User

Jan 15, 2015, 4:33 PM

Post #1 of 9 (1644 views)
engine code Sign In

He there everyone, this is a 04 corolla the code is p p0128 coolant temperature below trash hold what is this exactly mean

thank you


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 15, 2015, 7:46 PM

Post #2 of 9 (1621 views)
Re: engine code Sign In

It means the engine is running too cool. It is not reaching the specified temp soon enough or at all. It probably needs a thermostat.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



eyob07
User

Jan 15, 2015, 8:42 PM

Post #3 of 9 (1616 views)
Re: engine code Sign In

thank you for responding, actually I ve' replaced the thermostat, could this be a bad coolant temp tensor.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 16, 2015, 12:08 AM

Post #4 of 9 (1609 views)
Re: engine code Sign In

Does it actually warm up to normal now? CTS less likely that plug to it IMO if the problem at all,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 16, 2015, 3:02 AM

Post #5 of 9 (1603 views)
Re: engine code Sign In

You could check the CTS wit a scan tool by comparing the CTS and IAT temp reading before the car is started in the morning but it's unlikely the sensor would do that. It's nearly always a bad thermostat.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 16, 2015, 6:10 AM

Post #6 of 9 (1598 views)
Re: engine code Sign In

Agree with THERMOSTAT, it's installation and some position is critical. New or not and don't gook it all up with crap either. Always use specified temp rating, T



eyob07
User

Jan 16, 2015, 3:44 PM

Post #7 of 9 (1584 views)
Re: engine code Sign In

sorry for the miss spell, ya the engine warms up fine, don't know what else is associated with this, beyond the thermostat and engine coolant temp sensor, any suggestion can help.

thank you and God bless.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 16, 2015, 4:10 PM

Post #8 of 9 (1582 views)
Re: engine code Sign In

You don't need more suggestions. replace the thermostat as you were advised. The computer is not happy with the engine temp. Maybe you should have used a better quality stat.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 16, 2015, 9:12 PM

Post #9 of 9 (1574 views)
Re: engine code Sign In

Ditto - Quality thermostats only. I'm only beating on this for just what Hammer said - the computer isn't happy with what it sees for engine temp and you wont know till you have that absolutely know correct new or not.


No goo means don't guck one up to seal it such that the dang thing is clogged and can't close and some are meant for a certain position for a reason too - you didn't say an engine size so didn't go looking.


You have to know it's right or engine wont know what to do with itself as it warms up - done for that. If it still has a problem AFTER you go from there,


T







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