2005 Jeep Grand Cherokee belongs to the SUV family, which means it is designed to be a utility car. Compared to the others in its category, it possesses a higher power with more tractive capability. This version was developed by the Mercedes Benz in collaboration with Doge, and therefore not a traditional jeep in American Motors inventory. It has a 5.7 –liter V8 engine, its multi-displacement system shutting down 50% of its cylinders in cruising or mere acceleration. Most will love its improved leather seats which have been designed to accommodate different sizes of people. With the driver seat strategically in a symmetrical instrument panel, the steering wheel is at a great angle. However, it does not come without its issues. We will try to explain some of the common 2005 Jeep Grand Cherokee PCM problems below.
Difficulty in Starting
This problem is also encountered in the 1994 Jeep Grand Cherokee. It is a result of wrong input getting into the vehicle from a faulty PCM. This will likely cause a problem in the ignition, and if the extent of the 2005 powertrain Control Module pcm defection is to a point of not being able to adjust to the timings, your jeep will not open at all.
However, many car owners confuse this with a blown alternator or even a faulty starter. If there’s nothing wrong with those parts, be keen to check your PCM. It is also important to know that the jeep may also lose its power during acceleration as a result of fuel system failure.
The Check Engine light is on
If PCM provides incorrect inputs, as it occasionally does, other issues may crop up. Many Jeep Grand Cherokee owners have mentioned engine light issues, as well as power steering as one of those issues. The Check Engine light occasionally turns on. Majorly, this is caused by faulty 02 sensors, emissions challenges, and PCM issues. To be sure though, ensure you engage a mechanic with the right tools to analyze the car error codes to determine if your PCM is to blame.
In case you end up replacing the engine control module and still realize that the Check Engine light is still showing, do not blame the replacement PCM yet. There could be something else wrong with your jeep, and you should have it diagnosed and fixed any random error codes. The repair cost are worth it.
Engine Performance Issues in the 2005 Jeep Grand Cherokee
Like any car out there, the engine is the most vital component in ensuring the Cherokee works optimally. Immediately you learn of any faults in the engine, make it a priority to have it checked well. If the engine issues are frequent with your jeep, it is a good sign that some engine components are not functioning as they should, or to some degree, there could be erroneous engine codes.
One of the common indicators of a faulty engine is some red deposits around the oil fill cap, which could be accompanied by some leaking at the rear seal. Depending on the extent of the engine damage, you may even encounter stalling as you drive. If you ignore this, the damage will affect the car’s velocity and cruise control leading to significant repair cost implications. In addition, be on the lookout for any engine shaking and any rough idling. In case you identify them, ensure you get it checked. It is also important to note that the check engine light could or could not display in this case.
Faulty Wiring
The selling point of the Grand Cherokee is its rigged nature, as admirers see it ready to hit the road. However, many customers have come out to complain that a number of the 2005 models had challenges with the door harnesses. The major issue was their unresponsiveness and in some rare instances, the electrical components went off when driving. Although this is a scenario that can be fixed by the right mechanic, this particular scenario has greatly raised eyeballs among many owners. The alarm will especially be a bother since it will be going off every time it is triggered involuntarily.
Door harnessing issues are a simple indication of faulty wiring. However, it is always important to run the necessary diagnostic checks to exactly determine where the issue is originating from. This, when done well, will help keep your jeep in great working condition.
Inoperative Drivetrain System
Having a faulty drivetrain system has been one of the thorns in the flesh for many 2005 Grand Cherokee jeep owners. When this happens, you will easily notice a few strange behaviors. One of them is a drastic failure of the rear axle seal, accompanied by a faulty front driveshaft that will turn out to be quite inconvenient. If the powertrain driveline problem is ignored, more complications will occur such as damaging the 4*4 transfer case.
It is therefore recommended to perform routine checks and repair any ECM issues with time. Eventually, this will improve your jeep’s performance. At this point, we will point out the importance of choosing legitimate spares during replaced pcm .
Slightly flawed Steering
The National Highway Traffic Safety Administration has highlighted a few problems with the 2005 Jeep Grand Cherokee steering. This happens when there is a problem with the hydraulic power system. When this happens the car efficiency will significantly decrease. As is with many cars, a problematic steering wheel comes as a result of natural wear and tear. For the 2005 Jeep Grand Cherokee pcm problems, the car will show different signs that one should take seriously. The most notable one is the squeaking noise heard whenever one is making turns. This could be accompanied by a feeling of loose steering. Whenever you identify such a problem, ensure you get a proper diagnosis from a mechanic you trust.
Another problem may be a few unreliable suspensions. This is normally caused by a flawed control arm, making the whole suspension quite unreliable. In the case where the front wheel ball joints are hardly functioning well, the response for the suspension will reduce.
Conclusion
As highlighted above, the 2005 Jeep Grand Cherokee PCM Problems can extend beyond the check engine light coming on and you should always have a certified mechanic diagnosed the underlying issues for you.
Many of these problems can be fixed by having original spare parts. If you are experiencing any electrical problems or any PCM-related issues, feel free to reach out to us for help
FAQs
The obvious indication is the check engine light being on. Also, mostly your car will have trouble starting, or not starting at all. Although this could be caused by a different PCM error, it could be an indication of something wrong with your ECM computer.
Sudden loss of your gas mileage could also be an indication of a faulty PCM, as well as erratic shifting.
First, you need to verify that there is active battery voltage crossing into the PCM at pin connectors. Ensure that the two found wires are reading zero resistance. The 2 black/tan wires should be in the black connector, at the points of pins 31 and 32. The last step will be testing for reference voltage (5v) that will be originating from the PCM right at pin 17 (color orange) at the tan connector, with pin 31 carefully at the white connector. If the power input together with the grounds are all set but still nothing comes out of the 2 reference leads, the PCM is damaged.
To reset the 2005 Jeep grand Cherokee computer problems, first, disconnect the positive terminal from the battery and lay it on the ground for about 30 seconds. This is meant to discharge the capacitors and maintain adaptive memory for the engine control. Then reconnect the battery cable while turning the ignition on without starting the engine. Turn the headlight on and off, then turn off the ignition key.
The major problems with the 2005 Jeep grand Cherokee include occasional faulty wiring, slightly flawed steering, selected engine performance issues, and automatic transmission failures / transmission control issues.
Hi I recently send in my PCM to get repaired at computer exchange.They sent it back they never open it or tell me what they fix. Finally I got hold of a unprofessional employee and said it can’t be fix because of some throttle body codes is this true? They are refunding my money.I have a 2005 jeep grand Cherokee 5.7 .The PCM has not been in a flood or anything bad .can you ask a technician or let me no if you guys can fix it . thank you