Nitori
Senior Member
- Joined
- Apr 17, 2019
- Threads
- 7
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- 73
- Reaction score
- 79
- Location
- Arizona
- Vehicle(s)
- 2019 Civic Si Sedan, 2016 Toyota Tacoma
I’m fairly certain all analog ECT gauges have heavily damped middle ranges to the point where you basically get 3 readings from them: “cold”, “anywhere between 160 and 225”, and “lol warped deck”
I mean, this has been happening since before OBDII was even used. Many cars are notorious for not reporting accurate ECTs with their analog gauges.
People would constantly be asking why their ECTs were moving around so much if it was an actual readout. It ramps out the initial drop in ECT when the thermostat opens, and sitting in traffic on a hot day you would see it creep up until the fan kicks on and then drop, over and over.
Anyways, Honda decided they wanted to be special snowflakes and ECT is not polled via the OBD standard. You have to read some other value on the CAN bus I believe. Haven’t looked into it recently but that should at least get you pointed in the right direction.
I mean, this has been happening since before OBDII was even used. Many cars are notorious for not reporting accurate ECTs with their analog gauges.
People would constantly be asking why their ECTs were moving around so much if it was an actual readout. It ramps out the initial drop in ECT when the thermostat opens, and sitting in traffic on a hot day you would see it creep up until the fan kicks on and then drop, over and over.
Anyways, Honda decided they wanted to be special snowflakes and ECT is not polled via the OBD standard. You have to read some other value on the CAN bus I believe. Haven’t looked into it recently but that should at least get you pointed in the right direction.
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