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CODE P0128

Tiny
MGAINER
  • MEMBER
  • 2003 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 83,500 MILES
I took my car to and got a diagnostic reading with the code p0128 coolant temp below thermostat regular temp. Do you know where I can start to resolve this issue.
Tuesday, March 9th, 2010 AT 7:09 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
These cars had a common problem with the coolant temperature sensor going out. I would start by replacing it. Here is a guide to get your started.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Here is where it is in your car (below) I have both engines.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Tuesday, October 10th, 2017 AT 2:50 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I would be replacing the thermostat for that code that's a universal code for many makes and models for a bad thermostat I have replace a thermostat for many makes and models for that code.
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Tuesday, October 10th, 2017 AT 8:06 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
There's the stats for confirmed fixes to back up my thoughts on it's a bad thermostat.
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Tuesday, October 10th, 2017 AT 8:09 PM

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