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

How do you reset the PCM 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.

What is a PCM on 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.

How do you tell if Jeep PCM is bad?

Conclusion – Jeep Cherokee PCM Problems

  1. It shows random error codes.
  2. The engine stalls or misfires.
  3. The check engine light comes on.
  4. The vehicle has difficulty starting.
  5. The engine has performance issues.
  6. There is damage to the circuit board.
  7. There are transmission issues.
  8. Problems with sensors become more noticeable.

How do I reset my Jeep PCM?

This is the way I have always done it. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory. When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.

How do you reset the PCM on a Jeep Cherokee?

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

How much does it cost to replace 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.

How much does it cost to replace a PCM?

How much is a PCM for a Jeep Grand Cherokee?

The Best in Auto Repair The average cost for a Jeep Grand Cherokee powertrain control module replacement is between $644 and $838. Labor costs are estimated between $38 and $48 while parts are priced between $606 and $790.

How much does a PCM cost?

What causes a PCM to fail?

Water is the primary element to avoid as exposure to it can render the PCM irreparable. Other environmental factors that could lead to PCM failure include thermal stress due to excessive heat and excessive vibration that causes sensitive parts to fail.