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 MANUALSJEEP2023GRAND CHEROKEE TRAILHAWK 4XEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 44 (3.6L - DTCS U0426 TO U11BF)
2023 Jeep Grand Cherokee Trailhawk 4xe
Section 44 (3.6L - DTCS U0426 To U11BF)
2023 Jeep Grand Cherokee Trailhawk 4xeSECTION Section 44 (3.6L - DTCS U0426 To U11BF)
WARNING: This page is about a different variant/trim than selected.
- DTC Troubleshooting
- U0426 Implausible Data Received From Vehicle Security Control Module
- U0427 Invalid Data Received From Vehicle Security Control Module
- U0428 Implausible Data Received From Steering Angle Sensor
- U0429 Implausible Data Received From Steering Control Module
- U0432 Invalid Data Received From Multi-Axis Acceleration Sensor Module
- U047F Implausible Data Received From SEATBELT Sensor 1
- U110A Loss Of Communications With SCM - Can C
- U110C Lost Fuel Level Message
- U110E Lost Ambient Temperature Message
- U110F Lost Fuel Volume Message
- U1110 Lost Vehicle Speed Message
- U1120 Lost Wheel Distance Message
- U1133 Lost Stop/Start Switch 1 Message
- U113E Lost Communication With Intelligent Battery Sensor
- U1141 Lost Esp Torque Request Message
- U1186 Lost Communication With Adaptive Cruise Control Module
- U1199 Lost Hood Ajar Switch Voltage Message
- U11BC Lost Brake Switch Message
- U11BF-00 Lost Brake Pedal Position Message
- Notes
- Description And Operation - Braking Systems
- Component Functional Description - Brake Pedal Position Sensor
- Component Functional Description - Hydraulic Control Unit (HCU) Assembly
- Component Functional Description - Brake Pedal Simulator Pressure Sensor
- Component Functional Description - Wheel Speed Sensors
- Component Functional Description - Steering Angle Sensor
- Component Functional Description - Brake System Control Module (BSCM)
- Technical Data - Braking System Messages
- When Monitored
- Set Condition
- Default Action
- Possible Causes
- Diagnostic Overview
- Check For An Active Or Intermittent Condition
- Diagnostic Test-EBOOSTER Brake System - Pcm
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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.