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 MANUALSDODGE AND RAM20231500 CLASSIC SPECIAL SERVICEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM5.7L - DTCS P3497 TO U113E - 1500 CLASSICDTC TROUBLESHOOTINGU0109-LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULEPRELIMINARY DIAGNOSTIC CHECKS
2023 Dodge and Ram 1500 Classic Special Service
Preliminary Diagnostic Checks
2023 Dodge and Ram 1500 Classic Special ServiceSECTION Preliminary Diagnostic Checks
- Check for any Service Bulletins, Star On-line Cases or ECU flash updates that apply for the DTC or symptom.
- Check for any Battery voltage DTCs in the ECU. Low Battery voltage can cause a DTC.
- Circuit faults should typically be diagnosed before rationality/performance faults.
- Check the component harness connector(s) for proper connection at the component. Verify that the connector is completely plugged in and properly locked prior to disconnecting for testing. Disconnect the component harness connector and check for water intrusion and any pushed out, damaged, corroded, burnt, or spread terminals.
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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.