UltraGauge MX Pre-Purchase Reading
The OBDII standard describes certain parameters which can be accessed via the OBDII. Many of the parameters are left to the manufacturer’s discretion to support or not. This is why the gauges available through UltraGauge are vehicle dependent. All Manufacturers have the ability to access additional vehicle parameters beyond those specified in the OBDII. For example, there is no OBDII parameter for Transmission Temperature; however, some manufacturers can access this parameter. Fundamentally there are two types of parameters:
1. Standardised OBDII parameters; roughly 135. Many are not very useful and of the 135, manufacturers typically provide 1/3 or less. Ultragauge inherently offers around 60 of these parameters. Standardized OBDII parameters are typically related to emissions.
2. Manufacturer specific parameters: These are parameters that the manufacturer has inserted for their own purposes. Many are duplicates of the Standardized gauges, while others are wholly separate and not included in the standardized OBDII parameters. These parameters are not focused on emissions and can be any useful parameter the manufacturer has seen fit to insert.
Many manufactures access these parameters through the OBDII. Others access the parameters through proprietary, non-standard pins inserted into the OBDII connector. Only manufacturers which use the same interface as OBDII have parameters that can be accessed by the UltraGauge MX. Typically Ford, GM, and vehicles with CAN interfaces can be accessed. All vehicles sold in the USA since 2008 are required to support CAN, and many supported CAN prior to 2008. This is not necessarily true for vehicles sold into non-USA markets.
Manufacturer parameters typically cannot be accessed on Vehicles with 9141 and KWP2000 protocols/interfaces. In general foreign vehicles prior to 2008 will use the 9141 or KWP2000 protocol. Our vehicle gauge estimator can also be used to determine the protocol used by most vehicles. The UltraGauge MX can be used to access all of the ~135 standardized OBDII parameters, if supported, even on vehicles with 9141 or KWP2000 protocols. It’s important to understand that while the OBDII defines ~135 parameters, manufacturers only support a fraction of this; the older the vehicle, typically the fewer parameters supported.
The ability to access manufacturer specific parameters is very similar to the X-gauge feature found in ScanGauge™. All Codes which function in ScanGauge™ will function in UltraGauge with minor modifications. In order to access parameters, beyond the provided pre-programmed parameters, it is necessary to program Ultragauge with codes and it is for this reason the Ultragauge MX is only recommended for users which are very comfortable with technology and have the time to devote to tracking down codes for their vehicle. Information regarding parameters and their access and interpretation is not made public by manufacturers. This information over time leaks out or is found via reverse engineering. To simplify use, the UltraGauge MX is offered pre-programmed with 8 common manufacturer parameters for various vehicles. There is no guarantee that all the pre-programmed parameters will work with your year, make and model vehicle. Those that are not supported by your vehicle will show “Err”. It is best to search vehicle specific forums to understand if such parameters are accessible in your specific vehicle. Ultragauge.com does not have any additional gauges/codes beyond those provided as part of the pre-programming options.
The UltraGauge MX is simply a tool that provides the potential to access these parameters and provides no assurance that such parameters are actually available or accessible. The pre-programmed parameters can be fully reprogrammed by the user.
The UG MX supports 8 manufacturer programmable parameters. The following tables represent the various pre-programming options. However, not all parameters may work for your particular year and model. If your vehicle does not support the code for the parameter, “Err” will be displayed. Also, the preprogrammed codes may not be correct but are accurate to the best of our knowledge.
See link for specific vehicle details: http://www.ultra-gauge.com/ultragauge/support/Ultragauge_MX_1.3.pdf
See link for specific vehicle details: http://ultra-gauge.com/ultragauge/support/UG-MX1.4-Supplement.pdf
Frequently Asked Questions:
I want transmission temperature, which model should I buy?
The connector and interface that are used to communicate with the vehicle is known as OBDII. Various emission gauges can be accessed using the OBDII. Transmission temperature is not a standardized OBDII parameter. However, it may be available as a proprietary manufacturer parameter. (Please see additional FAQs below), Only the UltraGauge MX and UltraGauge Blue have the potential to access manufacturer parameters. The UltraGauge Plus can not access manufacturer parameters.
How is the UltraGauge MX different from the EM plus?
The EM Plus and the MX are identical, except that each provide the following additional features:
Ultragauge MX: Ability to access manufacturer parameters, if manufacturer codes are known.
The additional features in the EM Plus are not available on the MX, and the MX feature is not available on the EM Plus.
What are Manufacturer Codes?
Manufacturer codes are a means to access hidden parameters (gauges) that the manufacturer has inserted into the Standardized OBDII for their own purposes. For example, Transmission temperature is not an OBDII parameter and, if available at all, is only accessible using the Manufacturer's code. Many Manufacturer parameters are a duplicate of standardized OBDII parameters, while others are wholly separate and not included in the standardized OBDII parameters. Standardized OBDII parameters are focused on emissions, while Manufacturer parameters are not focused on emissions and can be any useful parameter the manufacturer has seen fit to insert. Codes are manufacturer proprietary, and vary by manufacturer, year, model, and engine size.
Codes are created by the manufacturer of the vehicle, not by UltraGauge
Here is an example of a code for a 2015 Toyota Landcruiser as it would be viewed on the UltraGauge MX programming screen:
Transmission Temp #1 (*C)
Abbr1: TFT Abbr2: 1*C
TCTRL: 92 RCTRL: 10
RPOS: 0810 MTCH: 210000
X: 0001 /: 0100 +: FFD8
Out Format: 00 Ave: 00
(Same as above with comments)
Transmission Temp #1 (*C)
Abbr1: TFT Abbr2: *C (This sets the text abbreviation that is displayed with the gauge value)
TDATA: 07E121D9000000 (This is the manufacturer code to access the parameter)
TCTRL: 92 RCTRL: 10 (This tells UltraGauge how to send the code and where in the response the gauge value can be found)
RPOS: 0810 MTCH: 210000 ( This tells UltraGauge how many bytes the data is and where it is in the vehicle's response)
X: 0001 /: 0100 +: FFD8 (This is the math applied to the response to render the gauge)
Out Format: 00 Ave: 00 (Special Formatting such as Temperature, or pressure, etc.)
Left/Right: 32 (number of digits to display too the left and right of the decimal point)
What is the difference between Manufacturer and Standard Gauges?
The OBDII standard describes certain parameters (gauges) which can be accessed via the OBDII. The "OBDII" is a collection of mechanical, electrical and protocol standards which essentially allow a device to attach to the vehicle and access vehicle emission parameters. Many of the parameters are left to the manufacturer’s discretion to support or not. This is why the gauges available through UltraGauge are vehicle dependent.
All Manufacturers have the ability to access additional vehicle parameters beyond those specified in the OBDII standard.
For example, there is no OBDII parameter for Transmission temperature; however, many manufacturers can
access this parameter. Likewise, there is a standardized parameter for Fuel Level %, but manufacturers commonly did not support it via the OBDII
on earlier vehicles, yet many manufacturers can access it.
I don't see my vehicle on the pre-programming option list on the UltraGauge MX product page?
The pre-programming options shown are the sum total of all the programming options we currently provide. The options were created with the assistance of UltraGauge enthusiasts who were able to confirm a set of codes and the resulting gauges were correct for their vehicle. The limited number of pre-programming options does not imply that there are not codes for a vehicle not listed. All vehicles have hidden manufacturer parameters. However, the codes to access these parameters may not be public for all vehicles. Often only a handful of codes are known for a specific vehicle. Codes are created and controlled by the vehicle manufacturer.
If your vehicle is not on the pre-programming list but you know that codes are available, then select a pre-programming option with the same protocol as your vehicle. If your vehicle uses 11-bit CAN choose the Tacoma option. If your vehicle uses 29-bit CAN (Honda and Volvo), choose the Honda option. If your vehicle is made by a non-USA company, and it is older than 2008, your vehicle will likely use the 9141 or KWP2000 protocol. Please see the 9141/KWP2000 FAQ below.
If you are unsure as to which protocol your vehicle uses, please see the "Which protocol does my vehicle use?" FAQ below.
Are Manufacturer Codes available for my vehicle?
The UltraGauge MX is offered with several pre-programming options. These pre-programming options are the most common "codes" for the particular option. However, these codes may or may not work for your particular vehicle. See "Why Doesn't the MX have codes for my vehicle?" below.
All vehicles have hidden manufacturer parameters. However, the codes to access these parameters may not be public for all vehicles. Often only a handful of codes are known for a specific vehicle. It takes automotive enthusiast to reverse engineer and make codes available . The best source for codes is an automotive forum specific to your vehicle. Please note that most vehicles which use the 9141 or KWP2000 protocols do not make manufacturer codes available via the OBDII, and the MX can not access manufacturer parameters in those vehicles.
Why doesn't the MX have Manufacturer codes for my vehicle?
The MX is simply a tool that in addition to general Ultragauge functions, can also access hidden manufacturer parameters. There have been some 40,000 different combinations of year, make, model & engine size since the introduction of OBDII in 1996. For each of these there can be hundreds of unique codes. As a result it is impractical for UltraGauge to provide and maintain a list of codes. The best source for codes, if any exist for your vehicle, is an automotive forum specific to your vehicle.
Will the pre-programming codes work for my matching vehicle?
The pre-programming codes are considered generic codes. That is they generally work for most vehicles of that type. They have also been chosen as they do work on the broadest set of the indicated vehicle type. However, manufacturers can and do change codes from year to year, model to model, make to make and engine size to engine size. As a result, there is no guarantee that the code(s) will work for you specific vehicle. The best means to confirm that codes will work for your vehicle, is to search a forum specific to your exact vehicle and find codes that other users have confirmed works for their same vehicle. In general most customers find that most or many of the pre-programming codes do work on their vehicles. However, there can be a great many more gauges (and codes) available for a particular vehicle and forums are the best place to find them. If you can find the code, then the MX can access the gauge.
I found a code for my vehicle that is used on a competitors product, will the code work on Ultragauge?
Yes. However, some formating changes will be necessary. Please see the MX programming supplement on the Ultragauge online user manual page for an example.
My vehicle uses the 9141 or KWP2000 protocol, can I still use the MX?
Yes, all the functions in the MX, except for the ability to access manufacturer gauges, will work on vehicles with 9141 and KWP2000 protocols. Manufactures which use 9141 and KWP2000 protocols typically have an alternate proprietary interface to access manufacturer parameters. As a result the MX can not access manufacturer parameters for vehicles that use the 9141 or KWP2000 protocols. There are some exceptions to this, but they are very rare. However, the MX can be programmed to access standardized parameters. For example, if your vehicle supports oil temperature, this could be accessed via the MX, but is not part of the MX's gauge set. The 9141 and KWP2000 protocols are older protocols and are found in older vehicles. Such vehicles typically do not have many parameters and it would be rare to find a parameter available in the vehicle which is not included in the MX's gauge set.
Excepting this one feature, all other features of the MX will work in a 9141/KWP2000 vehicle. Unless you plan to use the MX in multiple vehicles, its best to select the Ultragauge EM Plus for the 9141/KWP2000 vehicles.
The 9141 Protocol is typically found on pre-2008 non-USA and Chrysler Vehicles. The KWP2000 protocol was an enhanced version of the 9141 protocol that came out in the early 2000's and was replaced in 2008 by the CAN protocol. KWP2000 is rare and found on certain Audi's, VW's, BMW's, etc. Most Manufacturers went from 9141 directly to CAN and skipped KWP2000.
Can a pre-programmed MX be used on other vehicles?
The MX will work on any OBDII compliant vehicle, regardless of pre-programming. The MX specific function, that is the ability to access manufacturer parameters, will also work on any OBDII compatible vehicle for which manufacturer codes are available. Codes for one manufacturer WILL NOT work for a vehicle of another Manufacturer. Its common that codes for one vehicle model will not work for a different model of the same manufacturer, even if they are the same year. More specifically, codes are year, make, and model and engine size specific. A pre-programmed MX can be easily reprogrammed for a different manufacturer or different year or model of the same manufacturer, if the codes are known. See "What is meant by "pre-programming..." below.
What is meant by "pre-programming" and "reprogramming"?
The terms "programming codes", or "reprogramming codes", tend to concern some people. Its not the best description of the task. It may be more appropriate to use the term "configure codes" or "reconfigure codes". Programming codes involves entering in less than 15 2-digit numbers. The Ultragauge MX has a dedicated "programming" menu for each of the 8 possible Manufacturer gauges (Mgauges). There are several fields each clearly labeled. The numbers for each field are simply entered. Once complete, UltraGauge will access the Gauge. The process of entering the codes is trivial. The process of finding the codes is the challenge, depending on the vehicle.
Can I help create a new pre-programming option?
If you have put in the energy into finding, confirming, and tuning a set of Manufacturer gauges for a specific vehicle, and you would like to make the codes available to other owners of the same vehicle, Ultragauge will create a new pre-programming option. Please create a support ticket and attach a screen shot of the 8 Mgauges.