P0128 Coolant Thermostat DTC

FlashPro questions & answers specific to the 2007-2008 US TSX
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P0128 Coolant Thermostat DTC

Post by R2Racing » Thu May 23, 2019 5:01 am

TSX CU2 supercharged.
We caught P0128 DTC and already done everything found on forums, including thermostat replacement.
Does not matter, Second ECT sensor is enabled or disabled, we have the DTC within one or couple days.

I'm not sure, but believe the problem is in ECT2 which shows ZERO no matter ECT2 is disabled or enabled.

HDS does not show correct numbers and datalog cause Flashpro already linked, and I can not unlink it, because of using dealer FlashPro. Vicious circle )).

Guys, if you run CU2 TSX, may I ask you to check what Second ECT does display?

BTW, we have not had any issues before for 3 years, but updated software to latest one recently.

Any help will be very appreciated

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Re: P0128 Coolant Thermostat DTC

Post by Spunkster » Fri May 24, 2019 9:41 am

The next version of software will have the option to disable this, but it may or may not work.

There is no datalogging for the secondary sensor so any reading you are seeing is an anomaly.

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