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 RAM2024PROMASTER 3500 BASE, CUTAWAYREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (ELECTRIC VEHICLE CONTROL UNIT MODULE (EVCU) - DTCS P1CDB-00 TO P1EA4-00)DTC TROUBLESHOOTINGP1CF8-00 BATTERY HEATING SYSTEM FAILUREWHEN MONITORED
2024 Dodge and Ram ProMaster 3500 Base, Cutaway
When Monitored
2024 Dodge and Ram ProMaster 3500 Base, CutawaySECTION When Monitored
WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic runs continuously when the following conditions are met:
- Thermal system relay enabled.
- No HV Battery Pack Inlet Temperature Sensor DTCs set.
- Thermal System is in active heating mode.
- HV Battery cell temperature is below a calibrated value.
- The Electric A/C Compressor (EAC) Speed is greater than a calibrated value.
- The Electric Coolant Heater is requested ON.
- The Electric Coolant Heater power limit is above a calibrated value.
- The target temperature of the electric coolant heater is above a calibrated threshold.
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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.