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 MANUALSJEEP2024GLADIATOR NIGHTHAWK, PART TIME T/CASE CONTROL, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM3.6L (GPEC 2A) - DTCS U0001 TO U0155
2024 Jeep Gladiator Nighthawk, Part Time T/Case Control, Automatic Trans
3.6L (GPEC 2A) - DTCS U0001 To U0155
2024 Jeep Gladiator Nighthawk, Part Time T/Case Control, Automatic TransSECTION 3.6L (GPEC 2A) - DTCS U0001 To U0155
- DTC Troubleshooting
- U0001-00-Can C Bus
- U0101-00-Lost Communication With TCM
- U0102-00-Lost Communication With Transfer Case Control Module / AWD
- U0109-Lost Communication With Fuel Pump Control Module
- Known Issues - FPCM System
- FPCM System Operation
- Functional Description- Fuel Pump Control Module (FPCM) And Fuel Pump
- Functional Description - Powertrain Control Module (Pcm)
- Technical Data-Fuel System Pressure Specifications
- When Monitored
- Set Condition
- Default Action
- Possible Causes
- Diagnostic Overview-Fuel Pump Control Module
- Preliminary Diagnostic Checks
- Check For An Active Or Intermittent Condition
- Diagnostic Test - Communication And FPCM Internal Faults (P1205, P120A, U0109, U016C)
- Powertrain Verification Test
- U0121-Lost Communication With Abs
- Theory Of Operation-Braking Systems
- Component Functional Description - 4 Wire Brake Pedal Position Sensor
- Component Functional Description - Hydraulic Control Unit (HCU) Assembly
- Component Functional Description - Wheel Speed Sensors
- Component Functional Description - Steering Angle Sensor
- Component Functional Description - Anti-Lock Brake System Control Module (Abs)
- Technical Data-Braking System Messages
- When Monitored
- Set Condition
- Default Action
- Possible Causes
- Diagnostic Overview
- Check For An Active Or Intermittent Condition
- Diagnostic Test - Non-EBOOSTER Brake System - Pcm
- Diagnostic Test-Wheel Speed Sensor Faults
- U0125-Lost Communication With Dynamics Sensor
- U0129-Lost Communication With Brake System Control Module 1
- Description And Operation-Braking Systems
- Component Functional Description - 3 Wire Brake Pedal Position Sensor
- Component Functional Description - Hydraulic Control Unit (HCU) Assembly
- 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 - Non-EBOOSTER Brake System - Pcm
- Diagnostic Test-Wheel Speed Sensor Faults
- U0140-Lost Communication With Body Control Module
- U0151-Lost Communication With Occupant Restraint Controller
- U0155-Lost Communication With Cluster/CCN
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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.