2005 jeep grand cherokee pcm problems

1. What is a PCM in a Jeep Grand Cherokee?
2. What happens if PCM goes bad?
3. What makes a PCM go bad?
4. How do you reset the check engine light on a 2005 Jeep Grand Cherokee?
5. How do you reset the computer on a Jeep Cherokee?
6. What are the bad years for Jeep Grand Cherokee?
7. How many miles will a 2005 Jeep Grand Cherokee last?
8. What are the most common problems with the Jeep Grand Cherokee?
9. Can you drive a car with a bad PCM?
10. How much does it cost to replace a PCM?

What is a PCM in a Jeep Grand Cherokee?

The Powertrain Control Module (PCM) is the computer that controls most of your Jeep's essential systems. The PCM controls the engine timing, the fuel to air ratio, the transmission, and the anti-lock brakes, along with dozens of other smaller functions.

What happens if PCM goes bad?

Bad PCM Causes Engine performance issues. Engine misfiring or stalling and overall poor engine performance are common indications of problems with the engine control unit. Modern vehicles have various sensors that operate within a given range to ensure the intended functions of the engine.

What makes a PCM go bad?

PCMs typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). ... Thermal stress and vibration can form microcracks in circuit boards (which are repairable).

How do you reset the check engine light on a 2005 Jeep Grand Cherokee?

To turn off the Jeep Grand Cherokee check engine light, turn the ignition switch to ON but don't start the vehicle. Press the gas pedal 3 times within 10 seconds and turn the ignition off. Wait 10 seconds and start the engine.

How do you reset the computer on a Jeep Cherokee?

Disconnect the negative battery cable and leave it disconnected overnight. Reconnect the negative battery cable in the morning and all but any hard codes will be cleared. By disconnecting the battery, you are essentially giving the computer a form of amnesia, whereby the computer forgets any stored codes.

What are the bad years for Jeep Grand Cherokee?

Owners have submitted 10,819 complaints for all Jeep vehicles, and Car Complaints found that the worst models are all either Jeep Grand Cherokees or Jeep Cherokees. The worst model years are the 2011 Grand Cherokee, 2015 Grand Cherokee, 2014 Grand Cherokee, 2015 Cherokee, and 2014 Cherokee.

How many miles will a 2005 Jeep Grand Cherokee last?

Anything over 300,000 miles is considered high mileage for the Jeep Grand Cherokee. They will typically last around 200,000 miles, although some owners have reported that they are still driving this model SUV after the odometer has turned over 300,000.

What are the most common problems with the Jeep Grand Cherokee?

The four most common Jeep Grand Cherokee problems are erratic electronic shifting, engine stalling while driving, alternator failure, and ignition switch malfunction.

Can you drive a car with a bad PCM?

If your automatic transmission vehicle isn't shifting normally, take it to a mechanic immediately. A failed PCM or TCM can cause the car to get stuck in gear, which can be a serious safety issue. It can also lead to costly transmission damage.

How much does it cost to replace a PCM?

The PCM is a computer, and computers aren't cheap to replace. That's why the average PCM replacement cost is anywhere between $800 and $1,500, depending on the car model and labor costs. Even worse, this is almost all in the cost of the PCM itself. Labor typically only runs between $75 and $100.