Here is a no solder/no code solution for knowing your X150's coolant temperature and battery bus voltage;

The OBD Fusion app had a feature that lets you build miniature "dashboards" for your phone or tablet which can be populated with a wide range of gauges, each displaying one of hundreds of OBD PID's as well graphs and a moving map display. The gauges can also be edited after push-holding on their image in the dashboard creation window. The OBD reader I chose is the VEEPEAK OBDCheck BLE+ plus (Amazon $40) and an iPhone 12 mini.

You can get alot fancier, but this definitely does the job, as well as getting you onboard OBD Code reader capability in the car.

 

Nice idea, discussed many times in the forum. Cabrio Bob made a 3D printed module which fits into the ashtray location but has only temp and voltage and some are available for purchase in the Classified section.
There is also a Mr12Volt system that integrates the original TSD with Android Auto (and carplay) with a bit of tinkering.

 

I use Torque Pro and Track Recorder, displays whatever "gauges" you want, plus you can record your drive displaying those gauges. I would upload a video, but they are MP4

 

I use the OBD Link MX+
Don't leave home without it.
I think the cost was $100.
Worth every penny.
Tons of data and gauge styles.
I display it on my phone clip attached to the center left AC vent, eye level.
Rick

Default gauges on my OBDLinkMX+, Coolant temp is great to see!

 

I used the idea and method from @Sean W to install this maybe six years ago. I use it on every drive over a few minutes:

 

And mine, after installing oil pressure and temp sensors back in July, on my HKS Camp2 (definitely not the least expensive way to get gauges).

 

small and cheap Wiiyii on a custom angle bracket, held by friction between the knee steering panel & the console. You can find it at
for $35 or https://www.aliexpress.us/item/3256803898718873.htmlfor under $20! I taped the top of the screen only to see Coolant Temp & Battery Voltage through the steering wheel.
https://cimg3.ibsrv.net/gimg/www.jag...3f496dda3.jpeg

 

Not long ago I read that running something like these continuously in the OBDII port can negatively affect PCM functions. Any truth to that? I like the idea of having the gauges. Should have been one of the select-able screens in the dash.

 

Not according to Meta AI:

Running an OBD II reader continuously while driving generally doesn't cause problems, but consider these factors: 1. Power consumption: OBD II readers typically draw power from the vehicle's OBD II port. Most modern vehicles can handle this without issues, but prolonged use might drain the battery if the engine is off. 2. Data accuracy: Continuous monitoring ensures real-time data, but some vehicles may buffer data or experience communication errors. 3. Port wear: Frequent insertion and removal can wear out the OBD II port. 4. Interference: Some OBD II readers might interfere with vehicle systems or other devices. 5. Vehicle compatibility: Ensure the reader is compatible with your vehicle's make, model and year. 6. Software updates: Regularly update your OBD II reader's software for optimal performance. For safe, continuous use: 1. Choose a reputable, vehicle-compatible OBD II reader. 2. Monitor vehicle battery levels. 3. Avoid extreme temperatures. 4. Ensure proper installation. 5. Regularly update software.

 

Meta AI... Now there's a conflict.
Anyhow, the issue isn't 'reading'. The issue is the unexpected 'writes' that some tools perform.

 

As finicky as these cars are already, probably not something I'll do. I'll just wait for the idiot lights to tell me I've killed it.

 

Won't all the smoke, leaking, noise and fire tell you also?

 

One would hope, Cee Jay.

 

Dump the junk AI!

Yes some OBD devices do cause the car to stay awake and this has caused many dead batteries. The F-Type forum is full of this so it's car dependent. My XJ has never had a problem and I also use and recommend the OBD Link MX+. Don't forget the very cheap Toque Pro software with Cambo's custom Jaguar PID pack!

I have left the OBD Link MX+ in the car's OBD port for months at a time as I do like the real time coolant temperature plus you can set alarms as well when things go wrong. Pretty handy all the way around!

One tip from the F-Type guys and it may not apply to other cars? After you shut the car off and lock it check the emergency triangle light to see if it's on after about 15 minutes or so. Some cars drain the battery no matter what and you must disconnect the reader. Heck a number of cars have had the battery drained after getting inspected by the state with their plug in. Dealers tool have returned cars with this battery drain. One suggestion is these devices were not shut down properly and just unplugged from the car. Not sure this is it but has been posted before.
.
.
.

 

I have been using Cabrio Bob's ADU with an OBD reader plugged in for months at a time as well. I only unplug the reader when the car is going in for service or being submitted for the Cal EPA test. I have never had any problems of any kind with this setup. On the other hand with an earlier reader hooked up to Torque Pro I did have a couple of issues when the instrument panel and infotainment screen lit up like a Christmas tree. Solution was to shut everything down for 15 minutes. restart the XKR and then plug in the reader.