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 ALTITUDE X, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASCENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - DTCS U0149-00 TO U044A-00DTC TROUBLESHOOTINGU0420-00-INVALID DATA RECEIVED FROM POWER STEERING CONTROL MODULE "A"
2024 Jeep Grand Cherokee Altitude X, RWD
U0420-00-Invalid Data Received From Power Steering Control Module "A"
2024 Jeep Grand Cherokee Altitude X, RWDSECTION U0420-00-Invalid Data Received From Power Steering Control Module "A"
The COMMUNICATION DIAGNOSTIC PROCEDURE MUST be performed before replacing any component(s) or module(s). Perform the COMMUNICATION DIAGNOSTIC PROCEDURE. Refer to COMMUNICATION DIAGNOSTIC PROCEDURE .
RENDER: 1.0x
NO RELATED
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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.