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 57 (5.7L - DTCS P1128 TO P1573)
2023 Jeep Grand Cherokee Trailhawk 4xe
Section 57 (5.7L - DTCS P1128 To P1573)
2023 Jeep Grand Cherokee Trailhawk 4xeSECTION Section 57 (5.7L - DTCS P1128 To P1573)
WARNING: This page is about a different variant/trim than selected.
- DTC Troubleshooting
- P1128 Closed Loop Fueling Not Achieved - Bank 1 Upstream
- P1129 Closed Loop Fueling Not Achieved - Bank 2
- P1185 General Pressure Sensor Correlation
- P1D73 AGS Performance
- P1205 Fuel Pump Control Module Internal Performance
- Notes
- 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
- 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
- P1206 Fuel Pump Control Module Open Circuit To Fuel Pump
- Notes
- 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
- Set Condition
- Default Action
- Possible Causes
- Diagnostic Overview Fuel Pump Control Module
- Preliminary Diagnostic Checks
- Check For An Active Or Intermittent Condition
- Diagnostic Test - Fuel Pump PWM Control Circuit Faults (P0628, P0629, P1205, P120B, P2633, P2634)
- Diagnostic Test - Complete Fuel Pump Control Module System Testing (Not DTC Specific)
- Powertrain Verification Test
- P1239 Engine Oil Temperature Too Low
- P1300 Crankshaft Position Learn Out Of Range
- P1411 Cylinder 1 Reactivation Control Performance
- P1414 Cylinder 4 Reactivation Control Performance
- P1416 Cylinder 6 Reactivation Control Performance
- P1417 Cylinder 7 Reactivation Control Performance
- P1456 Fuel Tank Pressure Sensor Circuit Low
- P1457 Fuel Tank Pressure Sensor Circuit High
- P1495 Left Front SEATBELT Switch Circuit High
- P1496 Left Front SEATBELT Switch Circuit Low
- P1500 Ecu Configuration Mismatch
- P1524 Oil Pressure Out Of Range - Camshaft Advance/Retard Disabled
- P1572 Brake Pedal Stuck On
- P1573 Brake Pedal Stuck Off
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.