A Mustang's Computer and You
It’s very important to correctly identify your Mustang’s computer code, especially when you want to obtain some custom tunes. There are hundreds of codes out there and it would be near impossible and extremely hazardous to your motor if you attempt to guess your code. Below, you will find some examples of Mustang computer codes, arranged separately by year range and tips to help you recognize your specific ECU code.
|1987-1993 FoxBody Mustangs
||1994-1995 SN95 Mustangs
|Usually 2 Letters and 1 Number
||Usually 2 Letters and 2 Numbers
||Usually 3 Letters and 1 Number
||Usually 13 Characters
|Examples: A3M, A9L, A9P
||Examples: H4M3, T4M0, U4PO
||Examples: XSH1, CDC3, MDE2
||Examples: FR3A-12A650-EFB, GR3A-12A650-EFC
Differences Between the OBD1 and OBD2 Mustang ECU
More often than not, Mustang owners will tap into the onboard diagnostics, or OBD, to troubleshoot and tune the vehicle. For anyone running a 1996-current Mustang, they can confidently say the vehicle is equipped with an OBDII and move forward with whatever it is they have in mind. Owners of 1995 Mustangs can have either an OBDI or OBDII, which adds some confusion to the matter. Well not to worry, there is a really easy way to tell what you’ve got. All you need is the engine size. V8s of this model year were equipped with OBDI systems while the V6 models were given the OBDII early. Additionally, Cobras will have an OBDII port under the dash but it isn’t connected to anything as the car is equipped with an OBDI system. As far as scanners and modifications go, anything meant to work with OBDII will not work with OBDI. Some builders find ways to modify components to work, though they do take a risk by doing so.
Where Can I Locate My Mustang’s Computer Code?
Depending on what year Mustang you have, your Mustang's computer code can be found in one of a few different locations. Below we've laid out where your computer code should live based on what Mustang you own. Keep in mind, the actual location may vary a bit, but generally they can be found very close to the area pictured.
1987-2004 Mustang Computer Code Location
The Mustang computer code on 1987 to 2004 Mustangs should be on the passenger side (RH) door jam on a rectangular white sticker. However, sometimes the sticker can come off. In that case, you will need to look under the passenger side kick panel on the actual computer to get your Mustang's computer code. To remove the panel, simply run your fingers along the carpet to feel where it is separated and give a firm, but gentle tug on the panel to remove it; it should pop right off. Above are two example images from our 1998 GT Mustang: one showing the RH kick panel removed with computer/wiring exposed, second showing a close up of the computer code = DBZ2
2005-2009 Mustang Computer Code Location
The Mustang computer code for your 2005-2009 Mustang can be found under the hood, on the passenger side (RH) located on a silver rectangular box. Above are two example images from our 2006 GT Mustang: one overview of RH engine bay, second showing a close up of the computer code = TJF1.
Please Note: the code can be located anywhere on the silver box, not just on the top as shown in the example.
2010-2014 Mustang Computer Code Location
The Computer Code on the 2010-Present Mustangs will be under the hood on the Passenger Side, located next to the Fuse Box on a silver metal bracket. Below are two example images from our 2014 GT Mustang: one overview of RH engine bay, second showing a close up of the computer code = DHW1.
Knowing your Mustang's computer code is crucial when it comes time to get a new tune. Whenever you want to have custom tunes created, your specific computer code will provide tuning specialists with the mapping of your ECU, showing them tables and graphs that are not the same with every computer code. Seeing this information allows them to dial in on the exact modifications you may have added to your Mustang and get your car running its best and at its maximum performance.
2015-2018 Mustang Computer Code Location
The 2015's are slightly different and require the PCM PN rather than the 4 digit Computer Code. The 2015-Present Mustangs will be under the hood on the Passenger Side, located under the Fuse Box on a silver metal box. Below are two example images from our 2015 Ecoboost Mustang: one overview of RH engine bay, second showing a close up of the Computer PN = FR3A-12A650-BUF.
PLEASE NOTE THE P/N is what is required. The 4 digit code is no longer valid. Use the P/N Starting with FR3A or GR3A.
Please Also Note: the code can be located anywhere on the silver box, not just on the top.
Engine Troubleshooting Codes List
Fitment includes: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, GT, V6, Cobra, ShelbyGT500, MAch1, Bullitt, Boss, LX, SVO, EcoBoost, ShelbyGT350