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.
2021 Jeep Cherokee High Altitude, Automatic T/Case ControlFACTORY OEM SERVICE PROCEDURE
Spark Plug: Removal
- Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.
- Remove the ignition coil(s). Refer to REMOVAL
.
- Prior to removing the spark plug, spray compressed air into the cylinder head cover opening (1). This will help prevent foreign material from entering the combustion chamber.
- Remove the spark plug (1) from the cylinder head using a quality thin wall socket with a rubber or foam insert.
Factory Service Tools
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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