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When I sold my 2003 Dodge Dakota, I pulled the Scan Gauge unit to use with my 2018 Ridgeline. I hooked it up to the RL and to my surprise I could not get the engine air temperature or the water temperature to display. A quick call to the company confirmed that the 2018 Ridgeline (maybe the 2017) does not read the standard parameters but uses higher registered parameters. Fortunately, the Scan Gauge can be programmed to use the different parameters and here they are for anyone that is interested.

Coolant Temperature (Degrees Fahrenheit)
TXD: 33F10167
RXF: 044105670000
RXD: 3008
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: CT1

Intake Air Temperature (Degrees Fahrenheit)
TXD: 33F10168
RXF: 054106680000
RXD: 3808
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: IAT

Enjoy
 

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When I sold my 2003 Dodge Dakota, I pulled the Scan Gauge unit to use with my 2018 Ridgeline. I hooked it up to the RL and to my surprise I could not get the engine air temperature or the water temperature to display. A quick call to the company confirmed that the 2018 Ridgeline (maybe the 2017) does not read the standard parameters but uses higher registered parameters. Fortunately, the Scan Gauge can be programmed to use the different parameters and here they are for anyone that is interested.

Coolant Temperature (Degrees Fahrenheit)
TXD: 33F10167
RXF: 044105670000
RXD: 3008
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: CT1

Intake Air Temperature (Degrees Fahrenheit)
TXD: 33F10168
RXF: 054106680000
RXD: 3808
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: IAT

Enjoy
How old is your Scan Gauge? Mine is 15 years old wonder if it will work with my 2018 rtl-e
 

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Discussion Starter #3
Mine is 6 years old but I sent it in to Linear Logic for the $25 upgrade. Turn around time is amazing.
 

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When I sold my 2003 Dodge Dakota, I pulled the Scan Gauge unit to use with my 2018 Ridgeline. I hooked it up to the RL and to my surprise I could not get the engine air temperature or the water temperature to display. A quick call to the company confirmed that the 2018 Ridgeline (maybe the 2017) does not read the standard parameters but uses higher registered parameters. Fortunately, the Scan Gauge can be programmed to use the different parameters and here they are for anyone that is interested.

Coolant Temperature (Degrees Fahrenheit)
TXD: 33F10167
RXF: 044105670000
RXD: 3008
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: CT1

Intake Air Temperature (Degrees Fahrenheit)
TXD: 33F10168
RXF: 054106680000
RXD: 3808
MTH: 00090005FFD8 (00010001FFD8 for Celsius)
NAME: IAT

Enjoy
Thanks. The coolant Temperature codes worked on a V4.51 Scan Gauge II in a 2018 Ridgeline.
 

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2019 RTL-E (white on beige) in central Texas
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Thanks. The coolant Temperature codes worked on a V4.51 Scan Gauge II in a 2018 Ridgeline.
I'm running the same SG version on a 2019 RL, curious to know of you see different temps reported when you compare the above "CT1" x-gauge with the default standard " *FWT " (Fahrenheit Water Temperature - not an x-gauge) on your 2018?

Attached just FYI, tranny fluid temp and VCM status x-gauges (valid for 2G RL) which have been discussed in other threads.
 

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I'm running the same SG version on a 2019 RL, curious to know of you see different temps reported when you compare the above "CT1" x-gauge with the default standard " *FWT " (Fahrenheit Water Temperature - not an x-gauge) on your 2018?

Attached just FYI, tranny fluid temp and VCM status x-gauges (valid for 2G RL) which have been discussed in other threads.
Don't know if you got an answer to your question 11 months ago, CT1 vs fWT but yes, using XGauge CT1 and default fWT I see the same temp numbers. There seems to be maybe a second or so delay between both numbers changing on the display, but again, the displayed numbers are the same.
 
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