C2310 on RAM: How to Diagnose & Fix
Open or Short Circuit in Battery Circuit
1 RAM model · 1 documented issue · 1 critical · $1,800-$4,000 repair
C2310 on RAM by model: symptoms, diagnosis and fix
The DT-generation Ram 1500 uses a belt-driven electric power steering (EPS) system with the assist motor and control module integrated into the rack-and-pinion. When the EPS module shorts out or the motor fails, the driver loses power assist — sometimes momentarily at startup, sometimes permanently — and the steering becomes very heavy with an 'EPS' or 'Service Power Steering' warning. Because the motor/module are not serviceable separately, a failure requires replacing the entire rack assembly. Earlier 2015-2016 trucks had a related FCA-identified circuit-board contamination defect in the EPS unit.
Common Symptoms
- Sudden heavy/manual steering with loss of power assist
- EPS or 'Service Power Steering' warning light
- Momentary loss of assist at startup
- Clunk or whine from the steering rack
- Steering wander or dead spot on-center
How to Fix
Confirm with a scan tool (EPS control module fault codes) and check the 48V/12V supply and EPS connector before condemning the rack. The fix for a failed unit is replacement of the complete electric rack-and-pinion assembly and recalibration; owners report total repair bills of roughly $3,000-$4,000, often not covered once the basic/powertrain warranty expires. Keep the steering software flashed to the latest level, as some startup-only assist dropouts are resolved by an EPS software update rather than hardware.
Sources for this issue (3)
C2310 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C2310 mean on a RAM?
C2310 stands for "Open or Short Circuit in Battery Circuit." A Toyota/Lexus code in the shift control (parking lock control) system, set by the transmission/shift control ECU — seen on hybrids and other shift-by-wire vehicles. Battery voltage is constantly applied to the ECU's BATT terminal to keep its memory alive so it remembers the shift actuator's position (P versus non-P) while the vehicle is off. When that BATT circuit is open or shorted, the stored position is cleared each time the power switch is turned off, and the ECU sets C2310. The practical effect is that the actuator must relearn its position at each start, so the time from ignition on to "READY ON" can be longer than normal, often with a shift-system warning. Some sources rate this high severity; it should be diagnosed promptly. On RAM it is documented across 1 model: 1500.
What are the most common causes of C2310?
The most common causes of C2310 are: Blown or loose fuse feeding the shift control ECU BATT circuit, Open, shorted, or chafed wiring in the BATT feed circuit, Corroded or backed-out terminal at the shift control ECU connector, Corroded battery terminals, loose battery cables, or a recently disconnected/replaced 12V battery, Bad ground for the shift control ECU, Failed transmission/shift control ECU. The specific cause varies by vehicle.
How much does it cost to fix C2310 on a RAM?
Published repair estimates on RAM range from $1,800 to $4,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.