In a 2002 Jeep Grand Cherokee, a warning light shaped like an engine (often stylized as a check engine light) indicates that the
powertrain control module (PCM) has detected a problem within the vehicle's engine or emission control system. It's not specific to a single issue; many different things could trigger it.
To find out the exact cause, you need to have the diagnostic trouble codes (DTCs) read using an OBD-II scanner. Auto parts stores often offer this service for free. The codes will give a much clearer indication of what the problem is. Ignoring the light could lead to further damage or poor performance.
