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Code PO128

Tiny
MARLAINA PETERS
  • MEMBER
  • 2011 CHRYSLER 200
  • 3.6L
  • 6 CYL
  • 132,000 MILES
Check engine light came on. Got code from O'Reilly's of po128. Told it was coolant sensor. Where is that located on my car? I have replaced thermostat sensor already.

I bought a thermostat and sensor at the same time. I replaced sensor and engine light went off. Did not feel it needed the thermostat replaced.
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Saturday, September 30th, 2017 AT 5:15 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Here is a guide to show you what you are in for when doing the job and a diagram (below) to help you get the sensor replaced:

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

and if the code comes back I would replace the thermostat .

https://www.2carpros.com/articles/replace-thermostat

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

Cheers, Ken
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Sunday, October 1st, 2017 AT 12:39 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I would be replacing the thermostat. I have had those Chrysler 200 set that code and it was a bad thermostat. The dealer had the thermostats on a two month back order. I had to get the thermostat on eBay.
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Sunday, October 1st, 2017 AT 1:37 PM
Tiny
MARLAINA PETERS
  • MEMBER
  • 7 POSTS
The thermostat was bought a while back and I just kept it. Thanks for the input
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Sunday, October 1st, 2017 AT 5:42 PM
Tiny
MARLAINA PETERS
  • MEMBER
  • 7 POSTS
Where is the drain plug for my coolant?
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Sunday, October 1st, 2017 AT 6:33 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
At the bottom of the radiator.
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+1
Sunday, October 1st, 2017 AT 6:58 PM
Tiny
MARLAINA PETERS
  • MEMBER
  • 7 POSTS
Could I use ramps instead of jack stands to lift front?
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Monday, October 2nd, 2017 AT 8:55 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yes, make sure you block the rear tires so the car does not roll on you. Please post pictures of the job if you can.

Best, Ken
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Monday, October 2nd, 2017 AT 12:14 PM

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