Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Transmission
The idle learn procedure is required when the following service procedures have been performed:
- The battery power to the PCM has been disconnected.
- The PCM has been programmed.
- The PCM is replaced
- Install a scan tool.
- Diagnose and repair any DTCs before proceeding with this procedure. Refer to Diagnostic Trouble Code (DTC) List for the applicable DTC that set.
- Ensure that all electrical loads and accessories are OFF.
- Turn OFF the air conditioning (A/C).
- Ensure that the vehicle is in PARK.
- Set the parking brake and block the drive wheels.
- Turn ON the ignition.
- Clear the DTC information with the scan tool.
- Wait 5 seconds and start the engine.
- Run the engine at idle.
- Place the vehicle in DRIVE and let the engine idle for 10 minutes.
- Turn ON the A/C and continue to idle the vehicle in DRIVE for 10 minutes.
- Place the vehicle in PARK and let the engine idle for 10 minutes.
- Turn OFF the A/C and continue to idle the vehicle in PARK for 10 minutes.
- Turn OFF the ignition for 30 seconds.
- Perform the powertrain on-board diagnostic system check. Refer to Diagnostic System Check - Engine Controls .
- The idle learn procedure is complete.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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