Last updated on October 9th, 2023 at 05:39 pm

The 2007 Jeep Wrangler Model, is an SUV with a convertible top with two body styles; the two-door style and the four-door, extended wheelbase. Jeep Wrangler PCM is also known as (ECU) Engine Control Unit and (ECM) Engine Control Module, a collateral replacement for 2007 Jeep Wrangler Powertrain Control Modules models with an engine of 3.8L. The PCM is linked with a six-speed transmission manual, with an option of four-speed provided for those who prefer the automatic one. Throughout the years’ Jeep Wrangler has shown advancements beyond belief. Nevertheless, the 2007 model has indicated computer and electrical concerns. Replacing/repairing a defective Jeep Wrangler PCM provides a better solution but comes with other challenges. For instance, the SUV’s computer may be damaged by elements including; liquid leaks, broken parts, and corrosion. A selection of PCM problems outlined by the users include:

1. Transmission problems

2007 Jeep Wrangler users experience shifting difficulties daily from the reviews. These difficulties include; slipping, erratic shifting, delayed shifting, and sometimes no shifting, caused by the reduced transmission of fluid levels; consequently, we highly recommend having your fluid checked every 35000- 50000 miles to be on the safer side. In addition, if the mentioned signs or conditions are accompanied by the Engine light (Check Light) while driving, have the car inspected immediately, for it is better to avoid costly repairs that might come by ignoring such signs.

2. Electrical problems

A properly functioning electrical system for a vehicle exceedingly depends on a well-installed (TIPM) Integrated Power Module, thus easing everything from the pumping of fuel, window function generated by the power to the throttle control and headlights. Some of the signs/features of TIPM failure include; doors unlocking and locking with no input, refusal of airbags to deploy, power windows not opening, horn honking unnecessarily, starter refusal to start but cranking, and fuel pump burning because of constant use. Owners of 2007 Jeep Wrangler are encouraged to have their vehicles checked for proper repairs or rather replacements of TIPM to avoid main problems that might as well affect them in future


3. Lack of power

In cases where users experience an ignition failure switch does not keep the vehicle from running or starting. Instead, the car may drive without any accessories work. A few parts of the engine do not need a key to be safer, including; the dome light, horn, brake lights, and headlights. Features like radio, climate control, rear defrost, and power windows are usually tied to a good ignition switch to perform effectively. If you find the mentioned accessories/parts acting erratically, you might be experiencing an ignition issue that will need a checkup and maintenance immediately.

4. Starting problems

2007 Jeep Wrangler users might experience difficulties in starting their vehicles and sometimes no crank, the condition is caused by the electronic lockup of the module known as (WCM) Wireless Control Module. In most cases, when this module disfunctions, the remote system tends not to operate as required. To correct this concern, we recommend that the Wireless Control Module should be replaced without hesitation whenever it occurs. The purpose of carrying out a test on the Jeep Powertrain Control Module; is also to determine if it poses any faulty conditions that might cause a no or hard start condition/problem.

5. Engine stalling or stuttering

The PCM controls most vital systems of the Jeep Wrangler. The Powertrain Control Module manages the transmission, the ratio of fuel-air, engine timing alongside smaller functions. When a PCM fails, it leads to fuel inefficiency, no acceleration, and loss of power, this causes; rough shifting, wearing and tearing of essential engine constituents. . One of the main functions of the PCM is to make sure that the Camshaft and Crankshaft are in a good position for the engine to turn over, so it is vital to put in mind the mentioned factors to avoid dysfunctioning of other parts and enhance the proper functioning of the vehicle as well.

6. Faulty codes

At times the engine control module might send fault codes, in this case, the issue may not lie with the PCM; this could be the wiring trappings, and therefore, we advise our users/owners to perform an inspection for the installation of wires and be able to replace any corroded wires/ contacts. Another common concern is if the battery is damaged, it is also advisable to inspect battery terminals since the low voltage is a sign of PCM failure. To sum this up, it is very vital to carry out different diagnostic procedures centered on specific code errors for them to be able to find the most effective and workable solutions.

7. Engine check lights on

A gleaming light shows that the concern is critical and needs urgent care; if not, it could result in severe damage to the car. When the engine check lights for the Jeep Wrangler start behaving in that manner, it indicates that; the matter should be treated with urgency or the problem to be taken care of immediately. The flashing lights designate a severe engine misfire which allows dumping the unburnt fuel into the tire out system. Owners of Jeep Wrangler who might experience such difficulties are encouraged not to ignore the problem as it may lead to expensive repairs. If the problem is left unattended, it will spread through to the catalytic converter, a spark plug that causes the misfire that tends to be very expensive upon repairs.

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8. Gasoline mileage is ridiculously getting worse

A sudden drop in gasoline mileage is associated with many problems, some being serious while others are easy to correct. The issues that cause fuel inefficiency in vehicles include; thrust brake caliper, blocked fuel filter, damaged fuel pump, misaligned tires, defective airflow sensor, bad spark plugs, and greasy fuel injectors. To avoid such concerns; it is recommendable for the car to undergo an inspection or a diagnosis procedure whereby the mechanic inspects all the possible causes to reach for accuracy in the solution/ diagnostic procedure, It is also crucial for the mechanic to do a test drive to provide acceptable results and to be to point out the source of the issue. Problems associated with the fuel system eventually lead to stalling, starting problems, and rough engine running. 


To conclude, 2007 Jeep Wrangler PCM problems are substantial but avoidable and fixed by taking the vehicle for proper checkup and maintenance. It is recommendable to do thorough research before doing any  repair or replace Therefore, it is compulsory to have your car inspected from the beginning, and maintenance is regular to avoid any issues that may come in the future. If you are in the market for a 2007 Wrangler PCM , Flagship one sell Jeep Wrangler car computer that are pre-programmed and updated to match you specific VIN and software.


How do I test a 2007 Jeep Wrangler PCM?

Connect the OBDII Scan to (DLC) Data Link Connector below the dash.
Turn off all the accessories. IDM helps in storing immovable and historical fault codes. 
Clear off the continuous/ repeating DTCs, also record the fault codes for future referencing before clearing.
Carry out a rerun test; this assesses the fault present during the testing time for the Key On Engine Off on (DST) Demand Self-Test by detecting the issue/fault. 

How do you reset an engine control module on a Jeep Wrangler?

Disconnect the positive terminal of the battery touching the ground for approximately 30 seconds to emit the Power Control Module capacitors. 
Reconnect the cable for the battery, turn the ignition switch ON but do not start the engine.
Turn the headlights on then off. 
Turn the ignition key off. At this point, the ECU will reset back to factory settings recovering all the information.

What causes a PCM to go bad?

The most known environmental factors to cause PCM failure are; thermal stress caused by excessive heat, and the other one being excessive vibration which leads to the non-performance of sensitive parts that causes them not to function as required. 

How do you test a Powertrain Control Module?

Connect the positive lead of DV o M onto the PCM circuit power.
Connect the negative lead to the positive side of the battery when the car is running or KOEO (key on engine off) to measure voltage.


The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.

This Post Has One Comment

  1. Mike

    I have a 2008 Jeep wrangler with P2302 CEL. After replacing plugs, wires, coil pack I’m looking to test my PCM for failure or not. The post from your site says “How do you test a Powertrain Control Module?”
    Connect the positive lead of DV o M onto the PCM circuit power.
    Connect the negative lead to the positive side of the battery when the car is running or KOEO (key on engine off) to measure voltage.
    ~ I’m lost with the connect the positive lead of “DV o M onto the PCM circuit power.” What does that mean?
    Should it be 12V? Do you have any photos of “DV o M onto the PCM circuit power?” I want to make sure before I purchase one from you and it doesn’t fix it. Thanks, Mike

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