How do you reset the computer on a 2005 Jeep Grand Cherokee?

How do you reset the computer on a 2005 Jeep Grand Cherokee?

Jeep ECU Reset Procedure

  1. Disconnect the battery by removing the positive battery cable.
  2. Ground the positive cable to the negative cable for 30 seconds to erase the electric charge in the capacitors.
  3. Reconnect the positive cable to the battery.
  4. Turn the key to on but do not start.
  5. Turn the headlights on.

How do you reset a Jeep Cherokee computer?

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.

How do I reset my Jeep computer?

Jeep Wrangler JK: How to Reset Your ECU

  1. Step 1 – Remove the positive (red) battery cable.
  2. Step 2 – Ground the red cable to the negative terminal.
  3. Step 3 – Reconnect the positive battery cable.
  4. Step 4 – Turn on your Jeep.
  5. Step 5 – Cycle the headlights.
  6. Step 6 – Turn the key off and remove.

How many miles does it take to reset a jeep computer?

For good measure. Anytime that you reset your Jeep PCM you should keep in mind that you will need to drive your car for approximately 10-15 miles so your Jeep ECM can re-learn your driving habits and fuel management.

What is the PCM on a Jeep Grand Cherokee?

Powertrain Control Module
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.

Why does my Jeep Grand Cherokee stall?

There are three major causes for a stalled engine: A lack of fuel, a lack of air flow and improper ignition. Running out of fuel is one of the most common causes of engine stalling, but dirty fuel injectors or a plugged fuel filter can also be the culprit. Your engine needs air to run properly as well.

How do you reset the computer on a 2004 Jeep Grand Cherokee?

Jeep Cherokee and Jeep Grand Cherokee 1984-2004: How to Reset ECU

  1. Step 1 – Prepare to reset the ECU.
  2. Step 2 – Disconnect the battery.
  3. Step 3 – Ground positive cable to the negative cable.
  4. Step 4 – Reconnect the battery.
  5. Step 5 – Turn the headlights on and then off.
  6. Step 6 – Turn key to the “OFF” position.

Does disconnecting car battery reset computer?

A. It depends on the car’s age and type of ECU used. On some older cars, disconnecting the battery will reset the system but in most new cars it does nothing, except potentially reset the clock and radio station presets.

Will disconnecting a car battery reset the computer?

Will unhooking battery reset the computer?

While disconnecting the battery will not permanently damage your vehicle’s computer, it can cause it to function differently. That’s because, if you disconnect your battery for long enough to reset the computer, it may cause the processor to forget everything it has learned.

What are the signs of a bad PCM?

7 Common PCM Failure Symptoms

  • Your ‘Check Engine’ Light is On.
  • Your Car Won’t Start or Starts Roughly.
  • Sudden Loss of Gas Mileage.
  • You Failed Your Emissions Test.
  • Your Engine Stutters or Stalls.
  • Erratic or Random Shifting.
  • You’re Receiving a PCM-Related Error Code.
  • What to Do If You Experience PCM Failure Symptoms.