A Jeep Grand Cherokee WK2 cranks, stalls, or drops into limp mode, and the PCM is the part on the estimate. WK2 trucks ran from 2011 through 2021, and they were built with more than one engine. A 3.6 file will not run a 5.7, a 6.4, or the 3.0 EcoDiesel.
The generation on either side of the WK2 is a different truck again. A WK module and a WL module are not WK2 parts with a different model year stamped on them.
Here is how to match a WK2 PCM, and what else on these Jeeps copies a failed module.
Grand Cherokee WK2 PCM at a Glance
| Engine | What the PCM has to be | If the wrong file is installed |
|---|---|---|
| 3.6 Pentastar | 3.6 WK2 calibration for that year and driveline | Fuel, spark, and cam control for the wrong engine |
| 5.7 Hemi | 5.7 calibration, including the transmission it was built with | A Pentastar file has no Hemi maps |
| 6.4 SRT | SRT calibration | Torque and shift limits that do not belong to this engine |
| 3.0 EcoDiesel | The diesel controller for that emissions year | A gas PCM does not run this engine |
Use the label in the vehicle, then the Grand Cherokee PCM that matches it. The VIN carries the engine, the transfer case, and the emissions package.
WK, WK2, and WL Do Not Interchange
The WK (2005-2010), the WK2 (2011-2021), and the WL (2022-up) each have their own module generation. A connector that looks close is not a match. Order from the part number on the PCM that came out of this Jeep.
Inside the WK2, the 8-speed transmission on later trucks is a different control strategy from the earlier automatics. Shift complaints need the year and the transmission identified before a powertrain module is blamed. A TCM concern and a PCM concern are not the same invoice.
No-Start, Security Light, and a Module That Will Not Talk
Immobilizer
WK2 trucks use SKREEM or WIN pairing, depending on the year. A replacement that was never paired will crank and stall, or crank and not fire, with a security light. Does a Jeep PCM need to be programmed is the VIN and immobilizer step. It applies to every WK2 engine, including the diesel controller.
Communication Loss
If the scan tool cannot see the PCM, check power and grounds at the connector before the module is condemned. These controllers sit where water and road debris reach the harness. A corroded pin copies an internal failure. If power is stable and the module is still silent, or if an internal fault returns as soon as it is cleared, the PCM is the remaining cause.
EcoDiesel Is Its Own Part
The 3.0 diesel is not a gas PCM with a different tune. Fuel system, turbo, and aftertreatment logic live in that controller. A 3.6 or 5.7 module will not start a diesel WK2, and a diesel controller will not run a Hemi.
Match the WK2 Engine, Then Program It
A Grand Cherokee WK2 PCM has to match the 3.6, 5.7, 6.4, or 3.0 diesel, the year, and the driveline. WK and WL modules are the wrong generation. The correct hardware still needs a VIN flash and immobilizer pairing.
Premium PCM pre-programs Grand Cherokee modules to the VIN, with the immobilizer paired and a free lifetime warranty.
Call 1-888-735-1564 or email support@premiumpcm.com with the VIN and the part number from the original module.
Frequently Asked Questions
Will a WK PCM fit a WK2 Grand Cherokee?
No. 2005-2010 and 2011-2021 are different generations. Use the part number from the WK2 module.
Can a 3.6 PCM run a 5.7 WK2?
No. Each engine has its own calibration. The EcoDiesel is a separate controller again.
The security light flashes after installation. What failed?
The pairing step. The PCM has to be introduced to the SKREEM or WIN system and the keys. A pre-programmed module includes that.
Does the VIN matter if I already have the part number?
Yes. The part number confirms the hardware. The VIN selects the calibration, emissions package, and immobilizer data for this Jeep.