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.
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HOMESERVICE MANUALSJEEP2024GRAND CHEROKEE L LIMITED, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 27 (5.7L - DTCS P0420 TO P0461)
2024 Jeep Grand Cherokee L Limited, RWD
Section 27 (5.7L - DTCS P0420 To P0461)
2024 Jeep Grand Cherokee L Limited, RWDSECTION Section 27 (5.7L - DTCS P0420 To P0461)
WARNING: This page is about a different variant/trim than selected.
- DTC Troubleshooting
- P0420-Catalyst System Efficiency Below Threshold Bank 1
- P0430-Catalyst System Efficiency Below Threshold Bank 2
- P0440-General EVAP System Failure
- P0441-EVAP Purge System Performance
- P0443-EVAP Purge Solenoid Circuit
- P0452-EVAP Pressure Switch "A" Stuck Closed
- P0455-EVAP System Large Leak
- P0456-EVAP System Small Leak
- P0457-EVAP System - Loose Fuel Cap
- P0461-Fuel Level Sensor 1 Performance
RENDER: 1.0x
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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.